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2025-07-21

“Prohessian”的英英意思

单词 Prohessian
释义 Prohessian Math.|prəʊˈhɛsɪən|
[f. pro-1 4 + Hessian n.2]
(See quots.)
1862Salmon Geom. Three Dimensions xii. 338 The Hessian of any surface being of the degree 4n–8, that of a developable consists of the surface itself, and a surface of 3n–8 degree which we shall call the Pro-Hessian.Ibid. xv. 426. 1864 Cayley Coll. Math. Papers V. 267 The function PU, which for the developable replaces as it were the Hessian HU, is termed the Prohessian; and (since if r be the order of U the order of HU is 4r–8) we have 3r–8 for the order of the Prohessian.
“Prohessian”的英英意思

 

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