英语词汇“null plane”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

null plane n. (a) Mechanics and Geometry. [ < German Nullebene (A. F. Möbius Lehrb. der Statik (1837) I. vi. 144)] the plane containing all the null lines of a given torque that pass through a given point; (b) Physics a plane in a complexified space–time, whose real slice is a null line.

ΚΠ

1892 Amer. Jrnl. Math. 14 162 A surface S will be called self-reciprocal in the linear nulsystem, if to every point r of the surface S corresponds a tangent plane ξ of this surface S as nulplane, and inversely.

1902 Encycl. Brit. XXVIII. 660/2 The plane drawn through any point perpendicular to the direction of its motion is its nul-plane with respect to a linear complex having this line for central axis, and the quotient h/w for pitch.

1942 J. L. Synge & B. A. Griffith Princ. Mech. x. 301 A rigid body is acted on by a force F at O and a couple G. P is an assigned point, with position vector r relative to O. Show that there is a single infinity of lines through P about which the force system has no moment; show that these lines lie in a plane... (The lines are called null lines, and the plane a null plane.)

1984 R. Penrose & W. Rindler Spinors & Space-Time I. i. 38 The angle Θ between two null planes with common null vector, say U, can be defined as that between any two non-null vectors, one in each plane.

单词	null plane
释义	> as lemmas null plane null plane n. (a) Mechanics and Geometry. [ < German Nullebene (A. F. Möbius Lehrb. der Statik (1837) I. vi. 144)] the plane containing all the null lines of a given torque that pass through a given point; (b) Physics a plane in a complexified space–time, whose real slice is a null line. ΚΠ 1892 Amer. Jrnl. Math. 14 162 A surface S will be called self-reciprocal in the linear nulsystem, if to every point r of the surface S corresponds a tangent plane ξ of this surface S as nulplane, and inversely. 1902 Encycl. Brit. XXVIII. 660/2 The plane drawn through any point perpendicular to the direction of its motion is its nul-plane with respect to a linear complex having this line for central axis, and the quotient h/w for pitch. 1942 J. L. Synge & B. A. Griffith Princ. Mech. x. 301 A rigid body is acted on by a force F at O and a couple G. P is an assigned point, with position vector r relative to O. Show that there is a single infinity of lines through P about which the force system has no moment; show that these lines lie in a plane... (The lines are called null lines, and the plane a null plane.) 1984 R. Penrose & W. Rindler Spinors & Space-Time I. i. 38 The angle Θ between two null planes with common null vector, say U, can be defined as that between any two non-null vectors, one in each plane. extracted from nulladj. < as lemmas
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