Blogs about: Cohomology
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The Grothendieck-Riemann-Roch Theorem, a proof-sketch
By this time I’m sure everyone whose curiousity was piqued by the statement of the Grothendieck-Riemann-Roch theorem has read it themselves. Nevertheless, in case you haven’t, I will proce… more →
Rigorous Trivialities
Motives in Paris and Regulators in Barcelona
Andreas Holmstrom wrote 1 week ago: The Events page has been updated again. Some highlights: Copenhagen Topology Conference (Jan 8-10) C … more →
real multilinear algebra
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juanmarqz wrote 1 week ago: el álgebra multilineal sobre los números reales, , incluye a las formas diferenciales euclideas, ahí … more →
Leaving on a jet plane
christopherdrup wrote 1 month ago: All my bags are packed, I’m ready to go to the Mobile, Alabama. Cornelius Pillen invited me to … more →
Anabelian puzzle 4: What is the probability that a set of n points has no 3 collinear?
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JSE wrote 3 months ago: OK, this isn’t really an anabelian puzzle, but it was presented to me at the anabelian confere … more →
excuses, excuses
toomuchcoffeeman wrote 3 months ago: Well, the Shavgulidze preprint [henceforth [ETS]] and Brin’s notes [henceforth [MGB]] have bee … more →
Semi-expository project: amenability of Thompson's group F
toomuchcoffeeman wrote 3 months ago: Since I’ll be doing some teaching this coming semester – for the first time in a while … more →
Fuckin' Concrete Contemporary Abstract Algebra [Free eBook Download]
Nicolas Bourbaki Junior wrote 5 months ago: Do you want some fuck? How about some fuckin’ juicy algebra? Fuckin’ yeah? Ok, today you … more →
The Grothendieck-Riemann-Roch Theorem, a proof-sketch
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Matt DeLand wrote 5 months ago: By this time I’m sure everyone whose curiousity was piqued by the statement of the Grothendiec … more →
Addendum to "Hochschild cohomology"
christopherdrup wrote 6 months ago: My oh my, how many mistakes one can find in a week’s time. It turns out some of my initial exu … more →
Hochschild cohomology
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christopherdrup wrote 6 months ago: I’ve been thinking a lot about Hochschild cohomology lately. For the uninitiated, given an ass … more →
Homotopical categories and simplicial sheaves
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Andreas Holmstrom wrote 6 months ago: (This is an expanded version of the 2nd part of a talk I gave last month. For the first part, see th … more →
Applications of the Schubert Calculus
Charles Siegel wrote 6 months ago: Ok, this is going to be my last post in enumerative geometry for a while, as I’m kind of drift … more →
q-analogues and homogeneous spaces
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Steven Sam wrote 7 months ago: While I was working on my final paper for the course on quivers that I’m taking this semester, … more →
Lieblich's counter counterexample example
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JSE wrote 7 months ago: Max Lieblich gave a great talk at WAGS yesterday about something that looks like a counterexample to … more →
Pieri and Giambelli Formulas
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Charles Siegel wrote 7 months ago: It’s been a few weeks, but now I’m back and today we’ll talk about the multiplicat … more →
What is geometry?
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Andreas Holmstrom wrote 7 months ago: (This is an extended set of notes for Part 1 of a talk I gave a few days ago at the Young Researcher … more →
Moduli Spaces of Connections - Two Recent Talks
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Jeffrey Morton wrote 7 months ago: In the last couple of weeks of the winter term, there were two series of talks here at UWO, by diffe … more →
The Grothendieck-Riemann-Roch Theorem, Stated
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Matt DeLand wrote 8 months ago: Suppose you have a proper map between smooth (quasi) projective varieties. Then suppose you have a … more →
Schubert Classes and Cellular Cohomology
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Charles Siegel wrote 8 months ago: So, as of the last post in the series, we defined Schubert cells. We’re going to use them to … more →
