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15
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Algebraic subgroups and Hopf ideals

Published on
#schemes #algebraic-groups #hopf-algebras
102
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Is the defining representation of the orthogonal group (over any field) irreducible?

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#algebraic-geometry #representation-theory #algebraic-groups
58
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How to trivialize this 'vectorbundle'?

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#vector-bundles #algebraic-groups
256
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If $G$ is an algebraic group of adjoint type, is $\alpha_s^\vee(-1)=1$?

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#group-theory #representation-theory #algebraic-groups #root-systems #coxeter-groups
136
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Question on the Definition of L-Group

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#algebraic-groups #reductive-groups
497
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$U(2,1)$ is quasi-split

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#algebraic-groups #reductive-groups
105
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Twisted cubic as abelian variety

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#geometry #algebraic-geometry #algebraic-groups #abelian-varieties
316
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What is the isotypic decomposition of $S^*(End(V))$ as a $GL(V) \times GL(V)$ module?

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#linear-algebra #representation-theory #symmetric-groups #algebraic-groups
95
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Fixed points for variety of borels and $G/B$

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#algebraic-geometry #lie-groups #algebraic-groups
77
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How do elements of $W$ correspond to elements of $G/B$?

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#algebraic-groups
94
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If $V$ is finite dimensional and $G$ a unipotent subgroup of $GL(V)$, why can every element of $G$ be written as below?

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#representation-theory #algebraic-groups #invariant-theory
81
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Why is every element of this group upper triangular?

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#linear-algebra #linear-transformations #algebraic-groups
518
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What is the significance of allowing nilpotents in scheme theory?

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#algebraic-geometry #algebraic-groups
575
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$PGL(n)$ is a closed subgroup of $GL(n^2)$

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#matrices #group-theory #algebraic-groups
224
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Rational points of quotient vs. quotient of rational points

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#algebraic-geometry #algebraic-groups

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