| 释义 |
perpetuant Math.|pəˈpɛtjuːənt|
[ad. L. perpetuānt-em, pr. pple. of perpetuāre: see -ant.]
1. A seminvariant not reducible to a sum (or sum of products) of seminvariants of lower degree.
1885Cayley Coll. Math. Papers XII. 251 A seminvariant which is not reducible is said to be irreducible, or otherwise to be a perpetuant. This notion of a perpetuant is due to Sylvester, see his Memoir ‘On Subinvariants’.
attrib.1904Athenæum 21 May 660/1 ‘On Perpetuant Syzygies’, by Messrs. A. Young and P. W. Wood.
2. = perpetuana.
1753E. Bowen Map of Devon, The chief Manufactures [of Devon] are Kerseys, Serges, Druggets, Perpetuants, fine and coarse Cloths, and Lace, in all which many Families are employd. |