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单词 Octant
释义

octant


The coordinate planes (yz-plane, zx-plane, xy-plane) the space 3 into eight trihedral angles, which are called the octants of the space.  The magnitude of each octant as a solid angle is π2.

Any coordinate of a point moving in a certain octant preserves its sign (http://planetmath.org/SignumFunction).  One calls the octant, where all three coordinates are nonnegative, the first octant.  The other octants have no agreed numbering; see still http://de.wikipedia.org/wiki/Oktant_(Geometrie)Wikipedia.

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更新时间:2025/5/4 11:59:43