List questions from group-rings

Published on 13 May 2022 - 16:28

67

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About the intersection of two commutator subgroups

Published on 25 Mar 2026 - 14:29

97

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Mistake in proof: Symmetric group acting on group ring

Published on 30 Jul 2022 - 12:37

590

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About the definition of group algebra

Published on 06 Aug 2022 - 2:20

50

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Decompositions of a group algebra

Published on 11 Aug 2022 - 14:56

266

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Is the direct sum preserved under isomorphism

Published on 26 Mar 2026 - 1:09

77

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Jacobson radical of group ring is $\{\sum a_gg =0:\sum a_g =0\}$

Published on 06 Nov 2022 - 13:28

112

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Structural description of the center $Z(R[G])$ of a group ring

Published on 21 Nov 2022 - 0:32

54

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Recovering original definition of group cohomology from Ext definition

Published on 28 Nov 2022 - 10:58

64

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Description of projective $\mathrm{SL}_{2}(\mathbb{Z})$-modules

Published on 11 Dec 2022 - 22:49

48

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Image of augmentation ideal of a group ring under ring homomorphism.

Published on 26 Dec 2022 - 17:44

118

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Representations of the centre of the Group ring

Published on 22 Jan 2023 - 15:44

21

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Hasse invariants of Wedderburn components of group rings attached to a group and a normal subgroup

Published on 24 Jan 2023 - 14:25

List Question

Isomorphism between $\mathbb{Z}[C_n]$ and $\mathbb{Z}[X]/(X^n-1)$

About the intersection of two commutator subgroups

Mistake in proof: Symmetric group acting on group ring

About the definition of group algebra

Decompositions of a group algebra

Is the direct sum preserved under isomorphism

Jacobson radical of group ring is $\{\sum a_gg =0:\sum a_g =0\}$

Structural description of the center $Z(R[G])$ of a group ring

Recovering original definition of group cohomology from Ext definition

Description of projective $\mathrm{SL}_{2}(\mathbb{Z})$-modules

Image of augmentation ideal of a group ring under ring homomorphism.

Representations of the centre of the Group ring

Hasse invariants of Wedderburn components of group rings attached to a group and a normal subgroup

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