Assertion: ellipsoid's axis | /r/HasProperty | a \displaystyle a
Facets:
Source sentences:
text: The parameters determined are usually the semi-major axis, a {\displaystyle a} , and either the semi-minor axis, b {\displaystyle b} , or the inverse flattening 1 / f {\displaystyle 1/f} , (where the flattening is f = ( a − b )
text: Also, in terms of r a {\displaystyle r_{a}} and r p {\displaystyle r_{p}} , the semi-major axis a {\displaystyle a} is their arithmetic mean, the semi-minor axis b {\displaystyle b} is their geometric mean, and the semi-latus rectum ℓ {\displaystyle \ell } is their harmonic mean.
text: The ellipsoid is completely parameterised by the semi-major axis a {\displaystyle a} and the flattening f {\displaystyle f} .