Perpetuant

In mathematical invariant theory, a perpetuant is informally an irreducible covariant of a form or infinite degree. More precisely, the dimension of the space of irreducible covariants of given degree and weight for a binary form stabilizes provided the degree of the form is larger than the weight of the covariant, and the elements of this space are called perpetuants. Perpetuants were introduced and named by Sylvester (1882,p.105). MacMahon (1884, 1885, 1894) and Stroh (1888) classified the perpetuants. Elliott (1907) describes the early history of perpetuants and gives an annotated bibliography. There are very few papers after about 1910 discussing perpetuants; (Littlewood 1944) is one of the few exceptions.

单词	Perpetuant
释义	Perpetuant 英语百科 Perpetuant In mathematical invariant theory, a perpetuant is informally an irreducible covariant of a form or infinite degree. More precisely, the dimension of the space of irreducible covariants of given degree and weight for a binary form stabilizes provided the degree of the form is larger than the weight of the covariant, and the elements of this space are called perpetuants. Perpetuants were introduced and named by Sylvester (1882,p.105). MacMahon (1884, 1885, 1894) and Stroh (1888) classified the perpetuants. Elliott (1907) describes the early history of perpetuants and gives an annotated bibliography. There are very few papers after about 1910 discussing perpetuants; (Littlewood 1944) is one of the few exceptions.
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