Assertion: ellipse's focus | /r/HasProperty | fixed
Facets:
Source sentences:
text: A parabola can be obtained as the limit of a sequence of ellipses where one focus is kept fixed as the other is allowed to move arbitrarily far away in one direction, keeping ℓ {\displaystyle \ell } fixed.
text: A parabola can be obtained as the limit of a sequence of ellipses where one focus is kept fixed as the other is allowed to move arbitrarily far away in one direction, keeping ℓ {\displaystyle \ell } fixed.