Seminar of the session "Algebraic topology, geometric and combinatorial group theory"
timetable:
Tue 24 Feb, 11:00 - 12:00, Aula Dini
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seminar: Algebraic models and cohomology jump loci Seminar of the session "Algebraic topology, geometric and combinatorial group theory" (2015)
speaker: Alexandru Suciu (Northeastern University)abstract: A cornerstone of the theory of cohomology jump loci is the Tangent Cone theorem, which relates the behavior around the origin of the characteristic and resonance varieties of a space. I will revisit this theorem, in both the algebraic setting provided by cdga models, and in the topological setting provided by fundamental groups and cohomology rings. When the spaces in question are either smooth, quasi-projective varieties, or closed three-dimensional manifolds, the respective jump loci are much more tightly connected, albeit in different ways.
timetable:
Tue 24 Feb, 11:00 - 12:00, Aula Dini
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