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Proof of Tannaka duality after Deligne

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#abstract-algebra #algebraic-geometry #representation-theory #algebraic-groups
126
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Automorphism groups of different fiber functors isomorphic?

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#category-theory #representation-theory #algebraic-groups
192
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Group schemes vs abstract groups in GIT

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#algebraic-geometry #notation #algebraic-groups #geometric-invariant-theory
98
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Expressing the punctured affine plane as a quotient.

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#algebraic-geometry #homotopy-theory #algebraic-groups #algebraic-stacks
241
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Zariski-closure of finite linear groups

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#abstract-algebra #group-theory #finite-groups #algebraic-groups #zariski-topology
894
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Does semisimple element of a semisimple complex Lie algebra belong to some Cartan subalgebra?

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#algebraic-geometry #representation-theory #lie-groups #lie-algebras #algebraic-groups
899
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Galois action on the character group of a torus

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#algebraic-groups #galois-extensions
141
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Intersection of Levi subgroups via intersection of their Weyl groups

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#representation-theory #lie-algebras #algebraic-groups #root-systems #coxeter-groups
507
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Open Set in $\mathbb{Q}_p$-rational points of a torus is Zariski-dense in the torus.

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#algebraic-geometry #lie-groups #p-adic-number-theory #algebraic-groups #zariski-topology
1.7k
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Maximal tori of $SO(n)$ and $Sp(n)$

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#algebraic-groups
89
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Is every $\mathcal O$-structure an $\mathcal O$-group scheme?

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#algebraic-geometry #algebraic-groups #group-schemes
387
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Which semisimple elements of a semisimple Lie algebra belong to some $\mathfrak{sl}_2$ triple?

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#representation-theory #lie-groups #lie-algebras #algebraic-groups #semisimple-lie-algebras
535
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Calculating the Galois cohomology of $U(n)$

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#algebraic-groups #galois-cohomology
124
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$\text{GL}_2(\Bbb C)$ is not a split algebraic group in one definition?

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#abstract-algebra #algebraic-geometry #algebraic-groups
72
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Finite index subgroup of $SL_n$ over an algebraic extension of $\mathbb Z$

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#group-theory #algebraic-groups

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