Greek letters used in mathematics, science, and engineering - wikipedia Greek letters used in mathematics, science, and engineering Greek alphabet Αα Alpha Νν Nu Ββ Beta Ξξ Xi Γγ Gamma Οο Omicron Δδ Delta Ππ Pi Εε Epsilon Ρρ Rho Ζζ Zeta Σσς Sigma Ηη Eta Ττ Tau Θθ Theta Υυ Upsilon Ιι Iota Φφ Phi Κκ Kappa Χχ Chi Λλ Lambda Ψψ Psi Μμ Mu Ωω Omega History Archaic local variants Diacritics Ligatures Numerals ϛ ( 6 ) ϟ ( 90 ) ϡ ( 900 ) Use in other languages Bactrian Coptic Albanian Related topics Use as scientific symbols Book Commons Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities. Those Greek letters which have the same form as Latin letters are rarely used : capital A, B, E, Z, H, I, K, M, N, O, P, T, Y, X. Small ι, ο and υ are also rarely used, since they closely resemble the Latin letters i, o and u. Sometimes font variants of Greek letters are used as distinct symbols in mathematics, in particular for ε / ε and π / π. The archaic letter digamma ( Ϝ / ϝ / ϛ ) is sometimes used. The Bayer designation naming scheme for stars typically uses the first Greek letter, α, for the brightest star in each constellation, and runs through the alphabet before switching to Latin letters. In mathematical finance, the Greeks are the variables denoted by Greek letters used to describe the risk of certain investments. The majority of English - speaking mathematicians use neither the modern nor the historical Greek pronunciations of the names of the letters, but the traditional English pronunciation, e.g. / ˈθeɪtə / for θ ( US pronunciation ), cf. ancient ( thɛ̂ːta ) and modern ( ˈθita ). Contents 1 Typography 2 Concepts represented by a Greek letter 2.1 Αα ( alpha ) 2.2 Ββ ( beta ) 2.3 Γγ ( gamma ) 2.4 Δδ ( delta ) 2.5 Εε ( epsilon ) 2.6 Ϝϝ ( digamma ) 2.7 Ζζ ( zeta ) 2.8 Ηη ( eta ) 2.9 Θθ ( theta ) 2.10 Ιι ( iota ) 2.11 Κκ ( kappa ) 2.12 Λλ ( lambda ) 2.13 Μμ ( mu ) 2.14 Νν ( nu ) 2.15 Ξξ ( xi ) 2.16 Οο ( omicron ) 2.17 Ππ ( pi ) 2.18 Ρρ ( rho ) 2.19 Σσς ( sigma ) 2.20 Ττ ( tau or taoo ) 2.21 Υυ ( upsilon ) 2.22 Φφ ( phi ) 2.23 Χχ ( chi ) 2.24 Ψψ ( psi ) 2.25 Ωω ( omega ) 3 See also 4 References 5 External links Typography The Greek letter forms used in mathematics are often different from those used in Greek - language text : they are designed to be used in isolation, not connected to other letters, and some use variant forms which are not normally used in current Greek typography. The OpenType font format has the feature tag ' mgrk ' `` Mathematical Greek '' to identify a glyph as representing a Greek letter to be used in mathematical ( as opposed to Greek language ) contexts. The table below shows a comparison of Greek letters rendered in TeX and HTML. The font used in the TeX rendering is an italic style. This is in line with the convention that variables should be italicized. As Greek letters are more often than not used as variables in mathematical formulas, a Greek letter appearing similar to the TeX rendering is more likely to be encountered in works involving mathematics. Greek letters Name TeX HTML Name TeX HTML Name TeX HTML Name TeX HTML Name TeX HTML Alpha A α ( displaystyle mathrm ( A ) , alpha ) Α α Digamma Ϝ ϝ ( displaystyle mathrm ( Digamma ) , digamma ) Ϝ ϝ Kappa K κ κ ( displaystyle mathrm ( K ) , kappa , \varkappa ) Κ κ κ Omicron O o ( displaystyle mathrm ( O ) , mathrm ( o ) ) Ο ο Upsilon Υ υ ( displaystyle \Upsilon , \upsilon ) Υ υ Beta B β ( displaystyle mathrm ( B ) , \beta ) Β β Zeta Z ζ ( displaystyle mathrm ( Z ) , zeta ) Ζ ζ Lambda Λ λ ( displaystyle Lambda , lambda ) Λ λ Pi Π π π ( displaystyle Pi , pi , \varpi ) Π π π Phi Φ φ φ ( displaystyle Phi , phi , \varphi ) Φ φ φ Gamma Γ γ ( displaystyle Gamma , gamma ) Γ γ Eta H η ( displaystyle mathrm ( H ) , eta ) Η η Mu M μ ( displaystyle mathrm ( M ) , mu ) Μ μ Rho P ρ ρ ( displaystyle mathrm ( P ) , \rho , \varrho ) Ρ ρ ρ Chi X χ ( displaystyle mathrm ( X ) , chi ) Χ χ Delta Δ δ ( displaystyle Delta , delta ) Δ δ Theta Θ θ θ ( displaystyle Theta , \theta , \vartheta ) Θ θ θ Nu N ν ( displaystyle mathrm ( N ) , \nu ) Ν ν Sigma Σ σ ς ( displaystyle Sigma , sigma , \varsigma ) Σ σ ς Psi Ψ ψ ( displaystyle Psi , psi ) Ψ ψ Epsilon E ε ε ( displaystyle mathrm ( E ) , epsilon , \varepsilon ) Ε ε ε Iota I ι ( displaystyle mathrm ( I ) , iota ) Ι ι Xi Ξ ξ ( displaystyle Xi , \xi ) Ξ ξ Tau T τ ( displaystyle mathrm ( T ) , \tau ) Τ τ Omega Ω ω ( displaystyle Omega , omega ) Ω ω Concepts represented by a Greek letter Αα ( alpha ) See also : Alpha ( disambiguation ) α ( displaystyle alpha ) represents : the first angle in a triangle, opposite the side A the ratio of collector current to emitter current in a bipolar junction transistor ( BJT ) in electronics the statistical significance of a result the false positive rate in statistics ( `` Type I '' error ) the reciprocal of the sacrifice ratio the fine structure constant in physics the angle of attack of an aircraft an alpha particle ( He ) angular acceleration in physics the linear thermal expansion coefficient the thermal diffusivity In organic chemistry the α - carbon is the backbone carbon next to the carbonyl carbon, most often for amino acids right ascension in astronomy the brightest star in a constellation Iron ferrite and numerous phases within materials science the return in excess of the compensation for the risk borne in investment the α - conversion in lambda calculus the independence number of a graph Ββ ( beta ) See also : Beta ( disambiguation ) Β represents the beta function β represents : the thermodynamic beta, equal to ( k T ), where k is Boltzmann 's constant and T is the absolute temperature. the second angle in a triangle, opposite the side B one root of a quadratic equation, where α represents the other the standardized regression coefficient for predictor or independent variables in linear regression ( unstandardized regression coefficients are represented with the lower - case Latin b, but are often called `` betas '' as well ) the ratio of collector current to base current in a bipolar junction transistor ( BJT ) in electronics ( current gain ) the false negative rate in statistics ( `` Type II '' error ) the beta coefficient, the non-diversifiable risk, of an asset in mathematical finance the sideslip angle of an airplane the first - order effects of variations in Coriolis force with latitude in planetary dynamics a beta particle ( e ) sound intensity velocity divided by the speed of light in special relativity the beta brain wave in brain or cognitive sciences ecliptic latitude in astronomy The ratio of plasma pressure to magnetic pressure in plasma physics β - reduction in lambda calculus The ratio of the velocity of an object to the speed of light as used in the Lorentz factor In organic chemistry, β represents the second carbon from a functional group Γγ ( gamma ) See also : Gamma ( disambiguation ) Γ represents : the circulation in fluid dynamics the reflection coefficient of a transmission or telecommunication line. the confinement factor of an optical mode in a waveguide the gamma function, a generalization of the factorial the upper incomplete gamma function the modular group, the group of fractional linear transformations the gamma distribution, a continuous probability distribution defined using the gamma function second - order sensitivity to price in mathematical finance the Christoffel symbols of the second kind the neighbourhood of a vertex in a graph the stack alphabet in the formal definition of a pushdown automaton γ represents : the circulation strength in fluid dynamics the partial safety factors applied to loads and materials in structural engineering the specific weight of substances the lower incomplete gamma function the third angle in a triangle, opposite the side C the Euler -- Mascheroni constant in mathematics gamma rays and the photon the heat capacity ratio in thermodynamics the Lorentz factor in special relativity the damping constant ( kg / s ) Δδ ( delta ) See also : Delta ( disambiguation ) Δ represents : a finite difference a difference operator a symmetric difference the Laplace operator the angle that subtends the arc of a circular curve in surveying the determinant of an inverse matrix the maximum degree of any vertex in a given graph the difference or change in a given variable, e.g. ∆ v means a difference or change in velocity sensitivity to price in mathematical finance distance to Earth, measured in astronomical units heat in a chemical formula the discriminant in the quadratic formula which determines the nature of the roots the degrees of freedom in a non-pooled statistical hypothesis test of two population means δ represents : percent error a variation in the calculus of variations the Kronecker delta function the Feigenbaum constant the force of interest in mathematical finance the Dirac delta function the receptor which enkephalins have the highest affinity for in pharmacology the Skorokhod integral in Malliavin calculus, a subfield of stochastic analysis the minimum degree of any vertex in a given graph a partial charge. δ − represents a negative partial charge, and δ + represents a positive partial charge chemistry ( See also : Solvation ) the Chemical shift of an atomic nucleus in NMR spectroscopy. For protons, this is relative to tetramethylsilane = 0. stable isotope compositions declination in astronomy the Turner function in computational material science depreciation in macroeconomics noncentrality measure in statistics Εε ( epsilon ) See also : Epsilon ( disambiguation ) ε represents : a small positive quantity ; see limit a random error in regression analysis the absolute value of an error in set theory, the limit ordinal of the sequence ω, ω ω, ω ω ω,... ( displaystyle omega, omega ^ ( omega ), omega ^ ( omega ^ ( omega ) ), dots ) in computer science, the empty string the Levi - Civita symbol in electromagnetics, dielectric permittivity emissivity strain in continuum mechanics permittivity the Earth 's axial tilt in astronomy elasticity in economics expected value in probability theory and statistics electromotive force in chemistry, the molar extinction coefficient of a chromophore. set membership symbol ∈ is based on ε Ϝϝ ( digamma ) See also : Digamma Ϝ is sometimes used to represent the digamma function, though the Latin letter F ( which is nearly identical ) is usually substituted. A hypothetical particle Ϝ speculated to be implicated in the 750 GeV diphoton excess, now known to be simply a statistical anomaly Ζζ ( zeta ) See also : Zeta ( disambiguation ) ζ represents : the Riemann zeta function and other zeta functions in mathematics the coefficient of viscous friction in polymer dynamics the damping ratio relative vertical vorticity in fluid dynamics Ηη ( Eta ) See also : Eta ( disambiguation ) Η represents : the Eta function of Ludwig Boltzmann 's H - theorem ( `` Eta '' theorem ), in statistical mechanics Information theoretic ( Shannon ) entropy η represents : the intrinsic wave impedance of a medium ( e.g. the impedance of free space ) the partial regression coefficient in statistics elasticities in economics the absolute vertical vorticity ( relative vertical vorticity + Coriolis effect ) in fluid dynamics an index of refraction the eta meson viscosity energy conversion efficiency efficiency ( physics ) the Minkowski metric tensor in relativity noise in communication system models η - conversion in lambda calculus Cost - push supply side shocks in the Phillips curve equation ( economics ) A right angle, i.e., π / 2, as a follow - up to the tau / pi argument Θθ ( theta ) See also : Theta ( disambiguation ) Θ ( uppercase ) represents : an asymptotically tight bound related to big O notation. Debye temperature in solid state physics sensitivity to the passage of time in mathematical finance in set theory, a certain ordinal number in econometrics and statistics, a space of parameters from which estimates are drawn θ ( lowercase ) represents : a plane angle in geometry the angle to the x axis in the xy - plane in spherical or cylindrical coordinates ( mathematics ) the angle to the z axis in spherical coordinates ( physics ) Bragg 's angle of diffraction the potential temperature in thermodynamics the mean time between failure in reliability engineering soil water contents in soil science in mathematical statistics, an unknown parameter theta functions the angle of a scattered photon during a Compton scattering interaction θ ( `` script theta '' ), the cursive form of theta, often used in handwriting, represents the first Chebyshev function in number theory Ιι ( iota ) See also : Iota ( disambiguation ) ι represents : an inclusion map in set theory the index generator function in APL ( in the form ⍳ ) the orbital inclination in celestial mechanics. Κκ ( kappa ) See also : Kappa ( disambiguation ) Κ represents : the Kappa number, indicating lignin content in pulp κ represents : the Von Kármán constant, describing the velocity profile of turbulent flow the kappa curve, a two - dimensional algebraic curve the condition number of a matrix in numerical analysis the connectivity of a graph in graph theory curvature dielectric constant ( ε / ε 0 ) ( displaystyle ( \varepsilon / \varepsilon _ ( 0 ) ) ) thermal conductivity ( usually a lowercase Latin k ) thermal diffusivity a spring constant ( usually a lowercase Latin k ) the heat capacity ratio in thermodynamics ( usually γ ) the receptor which dynorphins have the highest affinity for in pharmacology Λλ ( lambda ) See also : Lambda ( disambiguation ) Λ represents : the von Mangoldt function in number theory the set of logical axioms in the axiomatic method of logical deduction in first - order logic the cosmological constant the lambda baryon a diagonal matrix of eigenvalues in linear algebra the permeance of a material in electromagnetism a lattice λ represents : one wavelength of electromagnetic radiation the decay constant in radioactivity function expressions in the lambda calculus a general eigenvalue in linear algebra the expected number of occurrences in a Poisson distribution in probability the arrival rate in queueing theory the average lifetime or rate parameter in an exponential distribution ( commonly used across statistics, physics, and engineering ) the failure rate in reliability engineering the fundamental length of a fabrication process in VLSI design the mean or average value ( probability and statistics ) the latent heat of fusion the lagrange multiplier in the mathematical optimization method, known as the shadow price in economics the Lebesgue measure denotes the volume or measure of a Lebesgue measurable set longitude in geodesy linear density ecliptic longitude in astronomy the Liouville function in number theory the Carmichael function in number theory a unit of measure of volume equal to one microlitre ( 1 μL ) or one cubic millimetre ( 1 mm3 ) the empty string in formal grammar binding of a variable in a function in lambda calculus in computer science. Μμ ( mu ) See also : Mu ( disambiguation ) μ represents : the Möbius function in number theory the ring representation of a representation module the population mean or expected value in probability and statistics a measure in measure theory micro -, an SI prefix denoting 10 ( one millionth ) the coefficient of friction in physics the service rate in queueing theory the dynamic viscosity in physics magnetic permeability in electromagnetics a muon reduced mass chemical potential in condensed matter physics the ion mobility in plasma physics the Standard gravitational parameter in celestial mechanics the refractive index of a medium with respect to another medium or vacuum. Νν ( nu ) See also : Nu ( disambiguation ) ν represents : frequency in physics in hertz ( Hz ) degrees of freedom in statistics Poisson 's ratio in material science a neutrino kinematic viscosity of liquids stoichiometric coefficient in chemistry dimension of nullspace in mathematics true anomaly in celestial mechanics the matching number of a graph Ξξ ( xi ) See also : Xi ( disambiguation ) Ξ represents : the original Riemann Xi function, i.e. Riemann 's lower case ξ, as denoted by Edmund Landau and currently the grand canonical ensemble found in statistical mechanics the xi baryon ξ represents : the original Riemann Xi function the modified definition of Riemann xi function, as denoted by Edmund Landau and currently a random variable the extent of a chemical reaction coherence length the damping ratio universal set Οο ( omicron ) See also : Omicron ( disambiguation ) Ο represents : big O notation ( may be represented by an uppercase Latin O ) o represents : small o notation ( may be represented by a lowercase Latin o ) Ππ ( pi ) See also : Pi ( disambiguation ) Π represents : the product operator in mathematics a plane the unary projection operation in relational algebra osmotic pressure π represents : Archimedes ' constant, the ratio of a circle 's circumference to its diameter the prime - counting function profit in microeconomics and game theory inflation in macroeconomics, expressed as a constant with respect to time the state distribution of a Markov chain in reinforcement learning, a policy function defining how a software agent behaves for each possible state of its environment a type of covalent bond in chemistry ( pi bond ) a pion ( pi meson ) in particle physics in statistics, the population proportion nucleotide diversity in molecular genetics in electronics, a special type of small signal model is referred to as a hybrid - pi model in relational algebra for databases, represents projection π ( a graphic variant, see pomega ) represents : angular frequency of a wave, in fluid dynamics ( angular frequency is usually represented by ω ( displaystyle omega ) but this may be confused with vorticity in a fluid dynamics context ) longitude of pericenter, in astronomy comoving distance, in cosmology Ρρ ( rho ) See also : Rho ( disambiguation ) Ρ represents : one of the Gegenbauer functions in analytic number theory ( may be replaced by the capital form of the Latin letter P ). ρ represents : one of the Gegenbauer functions in analytic number theory. the Dickman - de Bruijn function the radius in a polar, cylindrical, or spherical coordinate system the correlation coefficient in statistics the sensitivity to interest rate in mathematical finance density ( mass or charge per unit volume ; may be replaced by the capital form of the Latin letter D ) resistivity the shape and reshape operators in APL ( in the form ⍴ ) the utilization in queueing theory the rank of a matrix the rename operator in relational algebra Σσς ( sigma ) See also : Sigma ( disambiguation ) Σ represents : the summation operator the covariance matrix the set of terminal symbols in a formal grammar σ represents : Stefan -- Boltzmann constant in blackbody radiation the divisor function in number theory the real part of the complex variable s = σ + i t in analytic number theory the sign of a permutation in the theory of finite groups the population standard deviation, a measure of spread in probability and statistics a type of covalent bond in chemistry ( sigma bond ) the selection operator in relational algebra stress in mechanics electrical conductivity area density nuclear cross section uncertainty utilization in operations management surface charge density for microparticles Ττ ( tau or taoo ) See also : Tau ( disambiguation ) τ ( lower - case ) represents : torque, the net rotational force in mechanics the elementary tau lepton in particle physics a mean lifetime, of an exponential decay or spontaneous emission process the time constant of any device, such as an RC circuit proper time in relativity one turn : the constant ratio of a circle 's circumference to its radius, with value 2π ( 6.283... ). Kendall tau rank correlation coefficient, a measure of rank correlation in statistics Ramanujan 's tau function in number theory a measure of opacity, or how much sunlight can not penetrate the atmosphere the intertwining operator in representation theory shear stress in continuum mechanics an internal system step in transition systems a type variable in type theories, such as the simply typed lambda calculus path tortuosity in reservoir engineering in topology, a given topology the tau in biochemistry, a protein associated to microtubules the golden ratio 1.618... ( although φ ( phi ) is more common ) the number of divisors of highly composite numbers ( sequence A000005 in the OEIS ) in proton NMR spectroscopy, τ was formerly used for physical shift Υυ ( upsilon ) See also : Upsilon ( disambiguation ) Υ represents : the upsilon meson υ represents : frequency in physics textbooks Φφ ( phi ) See also : Phi ( disambiguation ) Φ represents : the work function in physics ; the energy required by a photon to remove an electron from the surface of a metal magnetic flux the cumulative distribution function of the normal distribution in statistics phenyl functional group the reciprocal of the golden ratio ( represented by φ, below ), also represented as 1 / φ the value of the integration of information in a system ( based on integrated information theory ) note : a symbol for the empty set, ∅ ( displaystyle \varnothing ), resembles Φ but is not Φ φ represents : the golden ratio 1.618... in mathematics, art, and architecture Euler 's totient function in number theory a holomorphic map on an analytic space the argument of a complex number in mathematics the value of a plane angle in physics and mathematics the angle to the z axis in spherical coordinates ( mathematics ) the angle to the x axis in the xy - plane in spherical or cylindrical coordinates ( physics ) latitude in geodesy a scalar field radiant flux electric potential the probability density function of the normal distribution in statistics a feature of a syntactic node giving that node characteristics such as gender, number and person in syntax the diameter of a vessel ( engineering ) capacity reduction factor of materials in structural engineering Χχ ( chi ) See also : Chi ( disambiguation ) χ represents : the chi distribution in statistics ( χ 2 ( displaystyle chi ^ ( 2 ) ) is the more frequently encountered chi - squared distribution ) the chromatic number of a graph in graph theory the Euler characteristic in algebraic topology electronegativity in the periodic table the Rabi frequency the spinor of a fundamental particle the Fourier transform of a linear response function a character in mathematics ; especially a Dirichlet character in number theory the Sigma vectors in the unscented transform used in the unscented Kalman filter sometimes the mole fraction a characteristic or indicator function in mathematics the Magnetic susceptibility of a material in physics Ψψ ( psi ) See also : Psi ( disambiguation ) Ψ represents : water potential a quaternary combinator in combinatory logic ψ represents : the wave function in the Schrödinger equation of quantum mechanics the stream function in fluid dynamics yaw angle in vehicle dynamics the angle between the x-axis and the tangent to the curve in the intrinsic coordinates system the reciprocal Fibonacci constant the second Chebyshev function in number theory the polygamma function in mathematics load combination factor in structural engineering the Supergolden Ratio Ωω ( omega ) See also : Omega ( disambiguation ) Ω represents : the SI unit measure of electrical resistance, the ohm angular velocity / radian frequency ( rev / min ) the right ascension of the ascending node ( RAAN ) or Longitude of the ascending node in astronomy and orbital mechanics the rotation rate of an object, particularly a planet, in dynamics the omega constant 0.5671432904097838729999686622... an asymptotic lower bound related to big O notation in probability theory and statistical mechanics, the set of possible distinct system states a solid angle the omega baryon the arithmetic function counting a number 's prime factors the density parameter in cosmology ω represents : angular velocity / radian frequency ( rad / sec ) the argument of periapsis in astronomy and orbital mechanics a complex cube root of unity -- the other is ω2 -- ( used to describe various ways of calculating the discrete Fourier transform ) the differentiability class ( i.e. C ω ( displaystyle C ^ ( omega ) ) ) for functions that are infinitely differentiable because they are complex analytic the first infinite ordinal the omega meson the set of natural numbers in set theory ( although N ( displaystyle mathbb ( N ) ) or N is more common in other areas of mathematics ) an asymptotically dominant quantity related to big O notation in probability theory, a possible outcome of an experiment in economics, the total wealth of an agent in general equilibrium theory vertical velocity in pressure - based coordinate systems ( commonly used in atmospheric dynamics ) the arithmetic function counting a number 's distinct prime factors a differential form ( esp. on an analytic space ) the symbol π, a graphic variant of π, is sometimes construed as omega with a bar over it ; see π the last carbon atom of a chain of carbon atoms is sometimes called the ω ( omega ) position, reflecting that ω is the last letter of the Greek alphabet. This nomenclature can be useful in describing unsaturated fatty acids. See also Blackboard bold letters used in mathematics English pronunciation of Greek letters Greeks ( finance ) ( Greek letters used in mathematical finance, including several invented names similar to Greek letters ) Latin letters used in mathematics List of letters used in mathematics and science List of mathematical symbols Mathematical Alphanumeric Symbols ( a Unicode block ) Typographical conventions in mathematical formulae References ^ Jump up to : Katzung & Trevor 's Pharmacology Examination & Board Review ( 9th Edition. ). Anthony J. Trevor, Bertram G. Katzung, Susan B. Masters ISBN 978 - 0 - 07 - 170155 - 6. B. Opioid Peptides + 268 pp. Jump up ^ Applied Linear Statistical Models ( 5th ed. ). Michael H. Kutner, Christopher J. Nachtsheim, John Neter, & William Li. New York : McGraw - Hill, 2005. ISBN 0 - 07 - 310874 - X. xxviii + 1396 pp. Jump up ^ Golub, Gene ; Charles F. Van Loan ( 1996 ). Matrix Computations -- Third Edition. Baltimore : The Johns Hopkins University Press. p. 53. ISBN 0 - 8018 - 5413 - X. Jump up ^ Pi, Tau and Eta. David Butler, Making Your Own Sense ( blog ). https://blogs.adelaide.edu.au/maths-learning/2011/06/08/pi-tau-and-eta/ Jump up ^ Pomega - from Eric Weisstein 's World of Physics Jump up ^ Outline for Weeks 14&15, Astronomy 225 Spring 2008 Archived 2010 - 06 - 15 at the Wayback Machine. Jump up ^ `` Tau Day - No, really, pi is wrong : The Tau Manifesto by Michael Hartl ''. 2010. Retrieved 2015 - 03 - 20. Jump up ^ `` A supergolden rectangle '' External links A pronunciation guide with audio Retrieved from `` https://en.wikipedia.org/w/index.php?title=Greek_letters_used_in_mathematics,_science,_and_engineering&oldid=817516513 '' Categories : Mathematical notation Greek letters Hidden categories : Webarchive template wayback links Articles containing Ancient Greek - language text All articles with unsourced statements Articles with unsourced statements from January 2015 Talk Contents About Wikipedia Français Italiano 日本 語 ਪੰਜਾਬੀ Română Türkçe 中文 Edit links This page was last edited on 28 December 2017, at 22 : 28. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: why do we use greek letters in science
Answer: for constants, special functions, and also conventionally for variables representing certain quantities