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2025-09-08

“tactinvariant”的英英意思

单词

tactinvariant

释义

ˌtactinˈvariant Math.
[f. L. tact-us touch + invariant.]
(See quots.)
1856Cayley Math. Papers II. 320 The function which, equated to zero, expresses the result of the elimination is an invariant which (from its geometrical signification) might be termed the Tactinvariant of the two quantics.1873Salmon Higher Plane Curves iii. (1879) 80 The condition that two curves U, V, should touch (which condition is called their tact-invariant).