### Time and place

Lectures: Mon 14:15-16:00, Wed 13:15-14:00Exercises: Wed 12:15-13:00

Seminar Room 02.08.011

### Topic

Studying manifolds up to diffeomorphism is very difficult. However, if we instead study manifolds up to “cobordism” and consider the disjoint union we obtain very computable groups. In fact, product of manifolds gives a cobordism ring. In the 1980’s, Atiyah and Segal realized that the notion of cobordism naturally appears when decribing topological field theories mathematically. In the course we will encounter these notions. You can find a syllabus here.### Lecture notes

Handwritten lecture notes will be available at this link and will be regularly updated throughout the semester.#### Reading assignment December 4

Please read through Lecture 11 in the lecture notes. The main result is also Lecture 16 in Freed, Bordisms Old an New. Find the reading assignment in the lecture notes or here. We will discuss the material on Wednesday, December 6.#### Reading assignment December 18

Discuss these questions to see whether you understoood the Classification of 2dTFTs. Reading relevant parts of Kock's book (see references) might help.#### Hybrid lecture on December 6

In case you still have trouble getting to TUM, we will have a hybrid class. COnnect via: https://tum-conf.zoom-x.de/j/61613802735?pwd=YTFpdlROSUE0YXd1VDU0djd6SEJXUT09 Passcode: category We will do our best to still make it a lively discussion. For this, if you join online, it is helpful if you join with video (but muted unless you'd like to ask a question). This makes the experience better for all of us.#### Knots

See Fabian Roll's beautiful animations: Ingo Runkel's slides contain most of what we did.### References

- Michael Atiyah, Topological quantum field theories. IHES Publ. Math., (68):175–186 (1989), 1988.
- Joachim Kock, Frobenius algebras and 2D topological quantum field theories
- Christian Kassel, Marc Rosso, and Vladimir Turaev, Quantum groups and knot invariants
- Daniel S. Freed, Bordism: Old and new
- Adams, The knot book.
- Carqueville, Runkel, Lecture notes on field theory
- Schweigert, Lecture notes on Hopf algebras, quantum groups, and topological field theory
- Hirsch, Differential Topology
- Kosinski, Differential Manifolds (both available via TUM library)
- Baez, Some Definitions Everyone Should Know (Definition of symmetric monoidal functor) here
- Vladimir Hinich,
*Deformations of homotopy algebras*, available here - Vladimir Hinich,
*DG coalgebras as formal stacks*, available here - Maxim Kontsevich, Lecture notes on
*Topics in algebra. Deformation theory*, available here - Maxim Kontsevich and Yan Soibelman,
*Topics in algebra. Deformation theory*, Lecture notes, available here - Marco Manetti,
*Deformation theory via differential graded Lie algebras*, available here - Marco Manetti,
*Differential graded Lie algebras and formal deformation theory*, available here - Marco Manetti,
*A voyage around coalgebras*, available here - Stewart Priddy,
*Koszul resolutions*, available here - Jean-Louis Loday and Bruno Vallette,
*Algebraic Operads*, available here - Alexander Polishchuk and Leonid Positselski,
*Quadratic Algebras*, available here - Alexander Beilinson, Victor Ginzburg, and Wolfgang Soergel,
*Koszul duality patterns in representation theory*, available here - Bernhard Keller,
*Koszul duality and coderived categories (after K. Lefèvre)*, available here - Gunnar Floystad,
*Koszul duality and equivalences of categories*, available here - Victor Ginzburg and Mikhail Kapranov,
*Koszul duality for operads*, available here - Jean-Louis Loday and Bruno Vallette,
*Algebraic Operads*, available here - Daniel Quillen,
*Rational homotopy theory*, available here - Alexander Berglund,
*Rational homotopy theory of mapping spaces via Lie theory for L-infinity algebras*, available here - Alexander Berglund, Lecture notes on
*Rational homotopy theory*, available here - Ezra Getzler,
*Lie theory for nilpotent L-infinity algebras*, available here - Marius Crainic,
*On the perturbation lemma, and deformations*, available here - Bruno Vallette,
*Algebra + Homotopy = Operad*, available here - V.I. Arnol'd,
*The cohomology ring of the colored braid group*, available here - Frederick Cohen, Thomas Lada, Peter May,
*The homology of iterated loop spaces*, available here - Dev Sinha,
*The homology of the little disks operad*, available here - Alexander Kupers,
*Talbot pretalk: Kontsevich formality of the little n-disks operad*, available here - Jacob Lurie,
*Lecture 8: Nonabelian Poincare Duality (in topology).*, available here - David Ayala and John Francis,
*Poincaré/Koszul duality*, available here