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awarded  Popular Question
Apr
26
comment Geometric Interpretation of Fractional Derivatives
In this thread I answer a very similar question, pointing out how they emerge in stochastic dynamics.
Apr
23
comment what is the definition of Mathematics ?
You say the term mathematics defined by usage - do you mean as opposed to the concept it denotes? This makes me wonder to what you refer to in the second sentence in "the definition" - the one of the concept or the term/name of it? I guess the thing which is defined by usage of the term which denotes it is defined by that property, and then this definition doesn't change over time. Sorry if I was unnecessarily trying to analyze the statement.
Apr
22
comment List all functions f: {a, b, c} → {0,1 }.
@Jared: I doubt people who have the answer here straight know it because they have a perfect function space cardinality intuition. I'd say it suggest that the function space being called $Y^X$ is a good mnemonic. You also imply that a question being harder makes it more interesting, I'm dubious about that also.
Apr
22
revised If $a_n = \frac{e^{n}}{e^{2n}-1}$ how do I show that $a_{n+1} \leq a_n$?
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Apr
22
comment List all functions f: {a, b, c} → {0,1 }.
@Jared: Why is that more interesting?
Apr
22
answered If $a_n = \frac{e^{n}}{e^{2n}-1}$ how do I show that $a_{n+1} \leq a_n$?
Apr
21
comment Determine whether or not $\neg q \to \neg (q \land (p \to \neg q))$ is a tautology
I'd suggest you think about what $q\to (p\to q)$ means and then you think again about the claim in question.
Apr
16
comment Is the product of all objects of a finite category an initial object?
What are the left and right projections out of $x\times x$ here? Once they are fixed, I feel I can always find a diagram so that it doesn't work out.
Apr
15
comment Second order PDE
You have seen proper formula formatting alla $\frac{{\mathrm d}y}{{\mathrm d}x}$ in edits of your other questions - why don't you apply the knowledge?
Apr
10
comment Integrability in Ito isometry
I read the article and came to the same question. Have you clarified it in the last 2 years? If there's something to share, you could write an answer and edit the Wikipedia page.
Apr
9
revised Closed form of the sum $\sum\limits_{n=0}^\infty \exp(-n^3)$
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Apr
9
revised Closed form of the sum $\sum\limits_{n=0}^\infty \exp(-n^3)$
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Apr
9
revised Closed form of the sum $\sum\limits_{n=0}^\infty \exp(-n^3)$
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Apr
9
answered Closed form of the sum $\sum\limits_{n=0}^\infty \exp(-n^3)$
Apr
1
awarded  Pundit
Mar
23
comment What is a Manifold?
@Danu: Why is that a plus? A physics-point of view was explicitly asked for.
Mar
19
comment What is a Manifold?
A space in which you can formulate laws of motion of quantities within it - laws which are equivalently valid from an infinite family of perspectives, which are smoothly related.
Mar
19
comment Convergence of $\sum_n \frac{n!}{n^n}$
I also don't think that's instantly immediate for which n this works, or why exactly $n^2$ pops up. It calls for a proof by induction.
Mar
17
accepted Does this property characterize monomorphisms?