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Canadian Journal of Mathematics, 1964
This paper follows naturally a note on parabolic differentiation (2) in which the parabolically differentiable points in the real affine plane were discussed. In the parabolic case, the four-parameter family of parabolas in the affine plane led to three differentiability conditions.
Lane, N. D., Singh, K. D.
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Conics and a generalised conical pendulum

The Mathematical Gazette, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Daners, Daniel, Wigmore, Theresa
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Dynamics at Conical Intersections

Annual Review of Physical Chemistry, 2018
The nonadiabatic coupling of electronic and vibrational degrees of freedom is the defining feature of electronically excited states of polyatomic molecules. Once considered a theoretical curiosity, conical intersections (CIs) are now generally accepted as being the dominant source of coupled charge and vibrational energy flow in molecular excited ...
Schuurman, Michael S., Stolow, Albert
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Is every quartic a conic of conics?

Mathematical Proceedings of the Cambridge Philosophical Society, 1991
The question of the title is to be interpreted as follows. Given a homogeneous nonzero quartic polynomial ø(x1, x2, x3), can one always find homogeneous quadraticsc, q1, q2, q3in three variables such thatI am indebted to Ulf Persson for asking this question, the answer to which is intimately related to the singularities of the projective quartic curve ...
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mathematics
fos: mathematics
parabola

inclined surface
ellipse
conics

sections
conic sections