# Conic sections

## Definitions

• Webster's Revised Unabridged Dictionary
• Conic sections (Geom) See under Conic.
• Conic sections that branch of geometry which treats of the parabola, ellipse, and hyperbola.
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## Usage

### In literature:

When he was sixteen we learn that he had read conic sections, and that he was engaged in the study of pendulums.
"Great Astronomers" by R. S. Ball
For indeed these superficies of conic sections are circles.
"Essays and Miscellanies" by Plutarch
The conic sections which I described on that blackboard, the learned hieroglyphics!
"The Life of the Fly" by J. Henri Fabre
A man of triangles and conic sections.
"Hypatia" by Charles Kingsley
The disciples of Plato invented conic sections, and discovered the geometrical foci.
"Beacon Lights of History, Volume III" by John Lord
Conic sections have always been preceded by Euclid.
"Essays on Education and Kindred Subjects" by Herbert Spencer
He is well known for his work on conic sections, and he may be called the founder of this study.
"History Of Egypt From 330 B.C. To The Present Time, Volume 10 (of 12)" by S. Rappoport
She had written commentaries on the mathematical works of Diophantus, and on the conic sections of Apollonius.
"History Of Egypt From 330 B.C. To The Present Time, Volume 11 (of 12)" by S. Rappoport
Conic sections 91 158.
"Carpentry for Boys" by J. S. Zerbe
Conic sections are obtained by cutting the cone by planes.
"The Romance of Mathematics" by P. Hampson
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### In news:

Is there a guideline for setting the height of the conical section of a column.
Weatherproof steel, six conical/elliptical sections, total length: 86 ft.
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### In science:

Section 3.2 gives examples of SL cones, and §3.3 deﬁnes SL m-folds with conical singularities, the sub ject of the paper.
Special Lagrangian submanifolds with isolated conical singularities. V. Survey and applications
Section 3.4 discusses homology and cohomology of SL m-folds with conical singularities.
Special Lagrangian submanifolds with isolated conical singularities. V. Survey and applications
The goal of this section is to work towards such a description of MN near a boundary stratum MX which is a moduli space of SL m-folds with conical singularities.
Special Lagrangian submanifolds with isolated conical singularities. V. Survey and applications
In the self-similar disk wind models (see, e.g., Casse & Ferreira 2000), this surface is conical, and its section is also indicated in Fig. 6 with a dashed line.
Jet rotation: launching region, angular momentum balance and magnetic properties in the bipolar outflow from RW Aur
On the other hand, partonic cascades (with large cross sections appropriate for sQGP) have actually found quite clear signature of the conical ﬂow, see Ma et al. .
The conical flow from quenched jets in sQGP
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