Question: Is the theory of relativity complete?
About the article "General relativity", section "Current status".

Candidate passages:
  Greg Egan's "Foundations".
The Hogg Notes on Special Relativity A good introduction to special relativity at the undergraduate level, using calculus.
Relativity Calculator: Special Relativity – An algebraic and integral calculus derivation for .
MathPages – Reflections on Relativity A complete online book on relativity with an extensive bibliography.
Relativity An introduction to special relativity at the undergraduate level, without calculus.
, by Albert Einstein  Special Relativity Lecture Notes is a standard introduction to special relativity containing illustrative explanations based on drawings and spacetime diagrams from Virginia Polytechnic Institute and State University.
Understanding Special Relativity The theory of special relativity in an easily understandable way.
An Introduction to the Special Theory of Relativity (1964) by Robert Katz, "an introduction ... that is accessible to any student who has had an introduction to general physics and some slight acquaintance with the calculus" (130 pp; pdf format).
Lecture Notes on Special Relativity by J D Cresser Department of Physics Macquarie University.  
In physics, relativistic chaos is the application of chaos theory to dynamical systems described primarily by general relativity, and also special relativity.  
Following is a list of the frequently occurring equations in the theory of special relativity. 
The theory of relativity, or simply relativity in physics, usually encompasses two theories by Albert Einstein: special relativity and general relativity.
(The word "relativity" can also be used in the context of an older theory, that of Galilean invariance.
)Concepts introduced by the theories of relativity include: Measurements of various quantities are "relative" to the velocities of observers.
In particular, space and time can dilate.
Spacetime: space and time should be considered together and in relation to each other.
The speed of light is nonetheless invariant, the same for all observers.
The term "theory of relativity" was based on the expression "relative theory" () used by Max Planck in 1906, who emphasized how the theory uses the principle of relativity.
In the discussion section of the same paper Alfred Bucherer used for the first time the expression "theory of relativity" (). 
Hermann Minkowski (22 June 1864 – 12 January 1909) was a Lithuanian-German mathematician.
He created and developed the geometry of numbers and used geometrical methods to solve problems in number theory, mathematical physics, and the theory of relativity.
Minkowski is perhaps best known for his work in relativity, in which he showed in 1907 that his former student Albert Einstein's special theory of relativity (1905), presented algebraically by Einstein, could also be understood geometrically as a theory of four-dimensional space-time.
Einstein himself at first viewed Minkowski's treatment as a mere mathematical trick, before eventually realizing that a geometrical view of space-time would be necessary in order to complete his own later work in general relativity (1915).