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Line 117: There are 23 basic invariants (essentially the basic covariants of a quintic) and 94 basic covariants. ~~===Covariants of a linear form and a quantic===~~ ===Covariants of several linear forms=== Line 128 ⟶ 126: There are 3 basic invariants and 6 basic covariants. ~~===Covariants of two quadratics and a linear form===~~ ===Covariants of several linear and quadratic forms=== Line 157 ⟶ 153: There are 8 basic invariants (3 of degree 2, 4 of degree 3, and 1 of degree 4) and 28 basic covariants. (Gordan gave 30 covariants, but Sylvester showed that two of these are reducible.) ===Covariants of many cubics or quartics=== ~~The numbers of generators of invariants or covariants were given by~~See {{harvtxt\|Young\|1898}}. ==See also==

Invariant of a binary form: Difference between revisions