Spice the Bird
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Registered User
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zzinbiel@aol.com
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Jun 4 |
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Nonexistence of boundary between convergent and divergent series? We could define the topology to consist of the set of all sequences, the empty set, the set of such that the associated series converges, and the series where the set the associated series diverge. With this topology, their is a well defined boundary which is the empty set. Not that this helps. |
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Apr 30 |
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Still Difficult After All These Years Doron Zeilberger' opinion 90 seems relevant math.rutgers.edu/~zeilberg/Opinion90.html |
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Apr 15 |
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What is “Data” involved in a mathematical construction? Data tends to be some kind of n-tuple. For instance a group, $G$ is a triple, $(S,,e)$ such that *conditions hold. The "set" of data is a bit like a "subset" of some product of "sets". A construction then is like a function from this product to some other "set". |
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Apr 6 |
awarded | ● Yearling |
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Mar 22 |
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Connections between topos theory and topology No problem.:))) |
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Mar 22 |
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Connections between topos theory and topology Do you mean to say "Suppose you want to embed some (essentially small) category \textit{of} spaces ect.", or is "category spaces" possibly a definition that I am not familiar with? |
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Mar 7 |
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A question on composites of pushforward and pullback Could you say what $PD_X,PD_Y$ are? |
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Jan 30 |
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What is an intuitive view of adjoints? (version 1: category theory) This intuition is the intuition behind Freyd's adjoint functor theorem. |
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Jan 28 |
answered | Are integers real? |
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Jan 9 |
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Why the preimage rather than image in Stone-type dualities. Also the preimage operator preserves union and intersection whereas the image operator does not. |
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Jan 9 |
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Why the preimage rather than image in Stone-type dualities. One thing to realize is that the power set functor is a functor from sets to the opposite category of sets. |
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Jan 3 |
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Can we categorify the formula for the quadratic Gauss sum? The paper, "arxiv.org/abs/math.CT/0212377"; makes precise and proves the following principle, "if an arithmetic statement about the objects can be proved by pretending that they are complex numbers, then there also exists an honest proof". |
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Jan 1 |
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Math Zeitgeist 2012 Maybe put this on meta? |
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Dec 24 |
revised |
Video lectures of mathematics courses available online for free added 32 characters in body |
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Dec 24 |
revised |
Maximal compact subgroups for locally profinite groups and generalization edited tags |
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Dec 22 |
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Link of a vertex of a 3-orbifold (link orbifold) I am not sure that the Orbifold has to be good. It seems that it only has to be "locally good" in which case, we could take the local universal cover and apply the same recipe as in the answer. |
