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Corner replacement for Morita contexts
Representation Theory · Submitted 23 Jan 2023
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Namely, we outline a canonical way to replace a corner subring of a given ring with one which is Morita equivalent, and look at how such an equivalence ascends.
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The abstract, sentence by sentence
We consider how Morita equivalences are compatible with the notion of a corner subring. Namely, we outline a canonical way to replace a corner subring of a given ring with one which is Morita equivalent, and look at how such an equivalence ascends. We use the language of Morita contexts, and then specify these more general results. We give applications to trivial extensions of finite-dimensional algebras, tensor rings of pro-species, semilinear clannish algebras arising from orbifolds, and functor categories.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We consider how Morita equivalences are compatible with the notion of a corner subring. | contribution 0.51 | 0.46 | 0.10 | unclear 0.62 |
| s1 | Namely, we outline a canonical way to replace a corner subring of a given ring with one which is Morita equivalent, and look at how such an equivalence ascends. | contribution 0.99 | 0.93 | 0.46 | asserted 0.97 |
| s2 | We use the language of Morita contexts, and then specify these more general results. | method 0.96 | 0.88 | 0.07 | asserted 0.93 |
| s3 | We give applications to trivial extensions of finite-dimensional algebras, tensor rings of pro-species, semilinear clannish algebras arising from orbifolds, and functor categories. | contribution 0.92 | 0.89 | 0.13 | asserted 1.00 |
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Original abstract
We consider how Morita equivalences are compatible with the notion of a corner subring. Namely, we outline a canonical way to replace a corner subring of a given ring with one which is Morita equivalent, and look at how such an equivalence ascends. We use the language of Morita contexts, and then specify these more general results. We give applications to trivial extensions of finite-dimensional algebras, tensor rings of pro-species, semilinear clannish algebras arising from orbifolds, and functor categories.
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