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Linear representations of algebras and groups, Lie theory, associative algebras, multilinear algebra.

8 votes
2 answers
1k views

Invariants of Symmetric group

The celebrated Chevalley–Shephard–Todd theorem says that $\mathbb C[V]^{S_n}$ is a polynomial algebra and gives the generators of this algebra, where $V$ is the standard (or natural) representation of …
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  • 153
5 votes
0 answers
433 views

FFT like theorems for tensor product

The fundamental theorem of symmetric functions states that $\mathbb C[V]^{S_n}$ is generated by the elementary symmetric polynomials, where $V$ is the natural representation of $S_n$. Then a theorem o …
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  • 153