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Monthly Archives: January 2015
H_2(Gamma_N(p),Z)
In this post (which is a followup to the last post), I wanted to compute the group , where is the congruence subgroup of for large enough and is prime. In fact, to make my life easier, I will also … Continue reading
Stable completed homology without QuillenLichtenbaum
Having just made (hopefully) the final revisions on my paper on stable completed cohomology groups, I wanted to record here a few remarks which didn’t otherwise make it into the paper. The first is that, in addition to the result … Continue reading
Posted in Mathematics
Tagged Borel, completed cohomology, Ktheory, Milnor, Moore, Neisendorfer, Paul Goerss, Quillen, Soule
1 Comment
Inverse Galois Problems II
David Zywina was in town today to talk about a follow up to his previous results mentioned previously on this blog. This time, he talked about his construction of Galois groups which were simple of orthogonal type, in particular, the … Continue reading
Posted in Mathematics
Tagged David Zywina, George Boxer, Hodge Numbers, HodgeTate, Inverse Galois Problem, Siegel Modular Forms, Stefan Patrikis
1 Comment
Abelian Spiders
This is a blog post about the thesis of my student Zoey Guo, who is graduating this year. (For a blog post on the thesis of my other student graduating this year, see this.) Let be a finite graph. Associated … Continue reading
Posted in Mathematics
Tagged Abelian Spiders, Chris Smyth, Dick Gross, Eriko Hironaka, Graph Eigenvalues, McMullen, Noah Snyder, Scott Morrison, Zoey Guo
4 Comments
Higher direct images of canonical extensions
I like KaiWen’s talks; he gives lots of examples, writes big with big chalk, and clearly explains the key points of the argument. I’m not sure I would classify his thesis as light reading material, but if he produced a … Continue reading
Posted in Mathematics
Tagged canonical, HLTT, KaiWen Lan, Koecher Principle, Michael Harris, subcanonical
2 Comments