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visits member for 5 years, 6 months
seen Apr 22 at 12:03

Apr
5
reviewed Leave Open “frequency” of fields for which the p-adic regulator vanishes (mod p)
Apr
5
reviewed Approve Intuition and/or visualisation of Ito integral/Ito's lemma
Apr
3
comment Finding commuting matrices
@JoonasIlmavirta That can't be right, since certainly scalar multiples of the identity commute with both $A$ and $B$. The feeling I have is rather that the eigenspaces of a matrix commuting with $A$ and $B$ should be big. Also, whether an eigenvalue is zero or not shouldn't matter, since $M$ will commute with $A$ and $B$ iff $\lambda I + M$ does.
Apr
3
awarded  Custodian
Apr
3
reviewed Looks OK Random Walk on $\mathbb{R}$ with Uniformly Distributed Steps and “Reflective” Boundary at Origin
Apr
2
awarded  Custodian
Apr
2
reviewed Leave Open divisible by all standard prime numbers
Apr
1
answered Why Jacobson, but not the left (right) maximals individually?
Mar
31
answered Infinitely many real roots
Mar
28
answered Reference that contains examples of absolutely indecomposable representations of quivers over a finite field
Mar
14
answered number of affine pieces of linear interpolation of convex functions in high dimension
Feb
22
reviewed Approve Is a distributive lattice planar iff it admits no B3 sublattice?
Jan
24
comment What is a good introduction to cluster algebras from surfaces?
I should point out the canonical source for sources on cluster algebras: Fomin's "Cluster algebras portal", math.lsa.umich.edu/~fomin/cluster.html
Jan
22
comment What is a good introduction to cluster algebras from surfaces?
@TomCopeland Thank you for reminding me about Lauren's notes, arxiv.org/abs/1212.6263 ! They seem to cover exactly what I wanted. If you make that an answer, I will accept it.
Jan
20
comment What is a good introduction to cluster algebras from surfaces?
@JanGrabowski, thanks for pointing out Schiffler's notes, which I was unfamiliar with, and which may come in handy (but for the same reason as for the Schiffler paper Tom suggested, are not really what this question is asking for).
Jan
20
comment What is a good introduction to cluster algebras from surfaces?
All suggestions are welcome, but in the interests of clarifying my question, I'll explain why Tom and Jan's suggestions aren't quite what I'm looking for. Tom's suggestion (a paper by Schiffler) doesn't have any Teichmuller theory at all, and what I really want is a straightforward explanation of the link to Teichmuller theory (interpreting cluster variables as lambda-lengths, etc.). Jan's suggestion (plus its sequel by Fomin-Thurston) are canonical sources, but I was hoping for something easier for a student to read, and which devotes less of its energy to the punctured case.
Jan
19
comment What is a good introduction to cluster algebras from surfaces?
@darijgrinberg Gekhtman-Shapiro-Vainshtein takes a Poisson geometry approach, which is great, but I would like something more direct if possible. (Though maybe what I want can be found in there.) If you post a more specific question about "the algebraic and combinatorial parts", I may be able to help. Have you seen the notes from Fomin's Park City course, written up by Nathan Reading (arXiv:math/0505518)?
Jan
19
asked What is a good introduction to cluster algebras from surfaces?
Jan
2
awarded  Civic Duty
Dec
18
reviewed Approve Rooks in three dimensions