Dag Oskar Madsen

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Name	Dag Oskar Madsen
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Reconstruction Conjecture holds for Directed Acyclic Graphs?

graph-theory co.combinatorics rt.representation-theory

dec 14 at 4:22 MathOverflow♦ 1●2●3

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Example: a pair of nonisomorphic parallel morphisms with isomorphic cones

Are there any nontrivial ring homomorphisms $M_{n+1}(R)\rightarrow M_n(R)$?

question on an exercise on homological algebra?

Abelian subcategory

Is Ext algebra of standard modules of quasihereditary algebras directed?

Indecomposable extensions of regular simple modules by preprojectives

Around the socle filtration of a Verma module

Which class of finite dimension algebra has only trivial tilting modules?

If an algebra is derived equivalent to a (special) biserial algebra is it biserial?

Auslander-Reiten theory of wild algebras known in examples?

Exceptional collections with many Exts

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