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Results tagged with invariant-theory
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user 18086
Invariant theory deals with an algebraic, geometric or analytic structure $X$, submitted to the action of an (algebraic) group $G$. It studies $G$-invariant elements of $X$ as well as the set of $G$-orbits.
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votes
Irreducible binary quartic form with prescribed $I$ and $J$-invariants
Here are constructions using Eisenstein's criterion to get an irreducible $F$ with given invariant $I$ (some restrictions apply).
The congruence conditions given in Bhargava & Shankar are:
$I \equi …
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