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Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
2
votes
Accepted
Reference request: generalized Jacobian variety for higher dimensional variety
Posting my comment as an answer:
See the top of page 216 in S. Zucker, Generalized intermediate Jacobians and the theorem on normal functions, Invent. Math. 33 (1976), no.3, 185–222. Note that Zucker …
0
votes
Interpretation of the formal groups arising from the DeRham-Witt complex
Let me add a different answer.
Let $p$ be a prime with $p>\dim X$. Let $\mathcal{K}_{i}$ denote the higher $K$-sheaf on $X$, and let $S\mathcal{K}_{i}:=\mathrm{im}((\mathcal{O}_{X}^{\times})^{\oplus i …
2
votes
Bloch–Beilinson conjecture for varieties over function fields of positive characteristic
This may not be precisely what you want, but a function field analogue of Beilinson's conjectures is formulated in R. Sreekantan, Non-Archimedean regulator maps and special values of $L$-functions, Cy …
4
votes
Interpretation of the formal groups arising from the DeRham-Witt complex
This is an old question but since it hasn't received much attention, let me just point out "the next" example beyond that given in the question:
Let $k$ be a perfect field of characteristic $p>0$, and …
5
votes
Accepted
Integral refinements of rigid cohomology
There has been some progress on this question since the question was asked. Apparently it was "known to the experts" that there cannot be an integral $p$-adic cohomology theory which is finitely gener …
8
votes
Accepted
Reference request: good reduction equivalent to crystalline étale cohomology
As Satan's Minion says, the good reduction case is
R. Coleman, A. Iovita, The Frobenius and monodromy operators for curves and abelian varieties, Duke Math. J. 97 (1999), 171--215.
For the semistable …
6
votes
Accepted
Original proof of Lefschetz's theorem on $(1,1)$ classes
I like chapter 6 of
Lewis, James D. A survey of the Hodge conjecture,
Second edition, Appendix B by B. Brent Gordon, CRM Monogr. Ser., 10, American Mathematical Society, Providence, RI, 1999.
It has l …
5
votes
Accepted
F-crystals from crystalline cohomology
I shall try to stick to the notation in Katz's paper. Let $k$ be a perfect field of characteristic $p>0$. Let $S_{\infty}$ be a $p$-adically complete and separated smooth formal $W(k)$-scheme and $f:X …
2
votes
Accepted
Norm/transfer functoriality of Bloch map on $K$-theory
This answer just amounts to adding a reference to Marc Hoyois' comment: there is a discussion of precisely this on pages 393-394 in Scholl's An introduction to Kato's Euler systems, London Math. Soc. …
6
votes
0
answers
304
views
Geometry of syntomic cohomology
Deligne cohomology has a geometric interpretation. For example, $H^{2}_{\mathcal{D}}(X,\mathbb{Z}(1))$ is identified with the group $H^{1}(X,\mathcal{O}_{X}^{\ast})$ of isomorphism classes of line bun …
4
votes
Accepted
Cohomology classes coming from algebraic K-theory
Apologies for being a bit late, but let me try to expand on my comment. An excellent source for this material is James Lewis' "user-friendly" survey article [Lew14].
First recall that for $X$ smooth o …
6
votes
Accepted
Rigid versus log-rigid cohomology for semistable varieties
$\require{AMScd}$I'll expand a little on my comment to give an answer to David's follow up question:
Firstly, the general relationship is described in Chiarellotto's Duke 1999 paper "Rigid cohomology …
5
votes
0
answers
310
views
A crystalline version of an isomorphism of Beauville and Donagi
Let $k$ be an algebraically closed field of characteristic $p>0$ and write $W:=W(k)$ for its ring of Witt vectors. Consider a smooth cubic fourfold $X_{0}\subset\mathbb{P}^{5}_{k}$ and let $F(X_{0})$ …
6
votes
Accepted
Relationship between the syntomic cohomology of Kato and of Fontaine-Messing
Ok, maybe I've figured this out. Hopefully somebody can correct me if this is wrong. Also, I'd still like to know a reference that writes this out in detail, if anybody has one.
I'll change the notat …
11
votes
1
answer
1k
views
Relationship between the syntomic cohomology of Kato and of Fontaine-Messing
Fix a prime $p$ and let $X$ be a $\mathbb{Z}_{p}$-scheme. Write $X_{n}:=X\otimes\mathbb{Z}/p^{n}$ and $\phi:X_{1}\rightarrow X_{1}$ for the absolute Frobenius. Let $X\hookrightarrow Z$ be a (suitable) …