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Jednorázová výběrová přednáška na různá témata.
V ZS 2024/25: Introduction to Hochschild cohomology and deformation theory
Poslední úprava: Žemlička Jan, doc. Mgr. et Mgr., Ph.D. (06.06.2024)
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Oral exam. Poslední úprava: Jeřábek Emil, Mgr. et Mgr., Dr., Ph.D. (27.12.2023)
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Thomas F. Fox, An introduction to algebraic deformation theory, Journal of Pure and Applied Algebra, Volume 84, Issue 1, 1993, Pages 17-41, ISSN 0022-4049, https://doi.org/10.1016/0022-4049(93)90160-U.
Manetti, Marco, Lie methods in deformation theory, Springer Monographs in Mathematics, Springer, Singapore 2022, https://doi.org/10.1007/978-981-19-1185-9 Poslední úprava: Žemlička Jan, doc. Mgr. et Mgr., Ph.D. (06.06.2024)
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Zkouška bude ústní. Poslední úprava: Žemlička Jan, doc. Mgr. et Mgr., Ph.D. (30.09.2024)
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This course offers an introductory account on Hochschild cohomology and its importance for the study of deformations of algebraic structures. Although the course primarily focuses on deformations of algebras, we also explain the role of Lie algebras in deformation problems and illustrate the surprising significance of this relationship to other areas of mathematics including geometry and topology.
Summary: (1) Introduction to Hochschild cohomology of algebras (Hochschild complex, interpretation as derived functors, examples). (2) Structures on the Hochschild complex (differential, composition and cup product, Lie bracket). (3) Introduction to deformation theory (deformations of algebras and affine varieties, examples, deformation problems as functors). (4) Deformations via dg Lie algebras (Maurer-Cartan elements, gauge equivalence and gauge group). Poslední úprava: Žemlička Jan, doc. Mgr. et Mgr., Ph.D. (06.06.2024)
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Some familiarity with the following concepts will be preferable, although central aspects will be reviewed during the course as they become relevant. (1) Category theory: categories, functors, natural transformations, Yoneda embedding. (2) Homological algebra: complexes, homology, derived functors. (3) Representation Theory: algebras and their modules. In addition, a basic familiarity with algebraic geometry, e.g. affine varieties and their relation to algebras, would be helpful to motivate certain concepts. Poslední úprava: Žemlička Jan, doc. Mgr. et Mgr., Ph.D. (06.06.2024)
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