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Sep
16
comment A Function $ g[0,\infty) \mapsto [0,1)$ Sharply Changing on Both Ends
Why would math.stackexchange welcome a question about a concept that is "not super well defined"?
Sep
16
comment What does it mean for a stochastic sequence to be “stochastically smaller” than some other stochastic sequence?
How can you possibly know that you "have to" show one sequence is stochastically smaller than another if you don't know the meaning of the phrase "stochastically smaller"?!?!?!?!
Sep
16
comment Rookie looking for help with basic mathematical problem
@HJRW: It is invariably the case with questions like this that the user wants to impose all sorts of unstated (and probably ill-defined) conditions on the candidate functions. Because these conditions are unstated, the question becomes an exercise in mind-reading, not in mathematics.
Sep
15
comment Rookie looking for help with basic mathematical problem
@HJRW: This question is not about mathematics, and therefore not suitable for math stackexchange.
Sep
8
awarded  Nice Answer
Sep
8
revised Bi-dual of vector spaces
added 24 characters in body
Aug
17
comment A group allowing exactly 7 group topologies
"This is why they say 7". Who is they?
Aug
4
comment Universal quantifier in Russell's Theory of descriptions - Who is the UNIVERSE?
PS. In ZFC, I can prove: "For all $A$, $A\subset A$." Are you worried that there is no set of all sets?
Aug
4
comment Universal quantifier in Russell's Theory of descriptions - Who is the UNIVERSE?
Andreas beat me to this with his answer, but it's models, not theories, that have "universes of discourse".
Aug
4
answered About Weil's proof of “Weil conjectures for curves and abelian varieties”
Jul
21
comment Is there a truly general voting impossibility theorem that applies to real elections?
You can address both problems (I) and (II) if two separate polities --- say Texas and California --- both adopt this system, with Texas voters making their payments to Californians and California voters making their payments to Texans. Then none of the democracy fees are wasted (which addresses problem II) and the people who put less monetary value on getting their preferred election outcomes will receive, on average, cash payments that they value more highly than they value those outcomes (at least assuming that the average payments are the same in both polities).
Jul
21
comment commutative algebra, diagonal morphism
@VivekShende: But we don't need $ker(A[x]\rightarrow B)$ to be finitely generated; we just need a certain quotient of it to be finitely generated, no?
Jul
20
comment Derivatives of infinite order
The axiom of choice???
Jul
12
awarded  Nice Answer
Jul
11
comment Is there any publication of “Beilinson’s dream” on motivic (complexes of) sheaves?
@Denis-CharlesCisinski: I should of course have mentioned these, though back when I was struggling to understand this, I found Soule and Ramakrishnan easier to follow. Your mileage, of course, may vary.
Jul
11
answered Is there any publication of “Beilinson’s dream” on motivic (complexes of) sheaves?
Jul
4
awarded  Cleanup
Jul
4
revised Properties of rings that have an elegant description in terms of the associated category of modules
rolled back to a previous revision
Jul
4
comment Properties of rings that have an elegant description in terms of the associated category of modules
@EricWofsey : In view of your comment, I'm rolling back my edit.
Jul
4
comment Properties of rings that have an elegant description in terms of the associated category of modules
@KConrad: I edited to insert the word "proper", which deals with $(1)$. It seems to me that $(0)$ is prime and therefore (trivially) a product of primes, so I'm not clear on why you say that's also problematic.