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bio website math.stanford.edu/~rmbellov
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visits member for 5 years, 2 months
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May
9
awarded  Nice Answer
Jan
20
asked Fiber functors to derived categories
Dec
25
comment Deformation of ordinary p-divisible groups via Grothendieck-Messing
I think you're implicitly asserting that the map $\omega_{G^m}\rightarrow D(G_0)(W(k))$ coming from $G'$ is the same as the composition $\omega_{G^m}\rightarrow \omega_G\rightarrow D(G_0)(W(k))$.
Dec
24
comment Shape of snowflakes
It's not the same as assuming no molecules attach at the same time, because in your random model you're effectively adjusting the probability of attachment based on the size of the snowflake. If anything, you want to adjust the probabilities based on the geometry --- I would guess that available vertices deep "inside" the snowflake would have lower probabilities of attachment.
Dec
24
comment Shape of snowflakes
I don't like your random model: it seems much more reasonable to fix a probability p and at time t, attach a new hexagon at every available lattice point with probability p. Assuming a fair amount of water in the air, water crystallizing at one vertex should be independent of water crystallizing at other vertices (to a first approximation).
Oct
8
awarded  Yearling
Mar
18
awarded  Good Answer
Mar
18
awarded  Nice Answer
Mar
18
awarded  Nice Question
Nov
2
awarded  Nice Answer
Oct
8
awarded  Yearling
May
11
awarded  Popular Question
May
8
awarded  Commentator
May
8
comment What's the difference between a real manifold and a smooth variety?
Don't these all illustrate the differences between real and complex manifolds, rather than between real manifolds and smooth complex varieties?
Apr
25
awarded  Organizer
Apr
25
revised triangulations of torus, general, and Euler number. (Hopefully more interesting/relevant)
edited tags
Mar
21
comment Chinese Remainder Theorem for rings: why not for modules?
Tensor the map $R/(I_1...I_n)\rightarrow R/I_1\times...\times R_I_n$ over $R$ with $A$.
Feb
23
awarded  Fanatic
Feb
15
comment visualizing what's going on in based homotopy theory, et al.
For c), have you looked at chapter 4 of Hatcher's book? Everything there is very geometric.
Feb
14
answered Homeomorphism onto a closed subset of a scheme that isn't a closed immersion