most citedObservable actions of algebraic groups

1 citations

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2 papers

math.AG2009★ 1 cited

Observable actions of algebraic groups

Lex Renner, Alvaro Rittatore

Let G be an affine algebraic group and let X be an affine algebraic variety. An action is called observable if for any G-invariant, proper, closed subset Y of X t…

math.RA2008

Generator coalgebras are not necessarily quasi-coFrobenius

Mariana Haim, Blas Torrecillas

We study the problem of whether a coalgebra that generates its category of left (right) comodules is left (right) quasi-coFrobenius or not. We prove it does not hold in general, by…