9,873 reputation
23277
bio website
location Lancaster, United Kingdom
age
visits member for 5 years
seen 14 mins ago

Just when I thought I was out, they pull me back in


13h
reviewed Leave Open Special retraction from a metric space onto an arc
14h
reviewed Close How to best fit for linear vs sinusoidal curve
16h
comment how to compute bergman kernel
Bergman kernel for what kinds of domain?
18h
comment Talking about the abc-conjecture
Peter Woit's blog doesn't use the words "slack off" AFAIK
18h
comment Talking about the abc-conjecture
"Does the community is slack off or isn't even wrong?" Do you honestly believe this tone is constructive?
20h
comment lower bound of a trace quadratic form
I missed the fact that X is strictly positive definite; however, one can easily find examples where AX is as small as desired while A and X have trace 1
21h
reviewed Close Is the ISC kaput
22h
reviewed Leave Open quasi rationality, interesting axiom of revealed preferences
22h
comment How to find secret key and public key for ECC cryptosystem?
This question appears to be off-topic because MO is not Jeeves
22h
comment lower bound of a trace quadratic form
Looking at diagonal matrices A and X where AX=0 makes me wonder: what could one possibly hope for beyond the trivial bound?
1d
comment Zero-mean assumptions concerning r.d.'s when reading graduate-level probability texts
The variance of a random variable is unchanged if you add a constant to that random variable. Multiplying a random variable by a real constant $c$ has the effect of multiplying the expectation by $c$ and the variance by $c^2$. These are basic results of probability theory, hardly graduate level
1d
comment Obscure Names in Mathematics
Oh come on - if we are going to add theorems named after the wrong people then we will be here all day...
1d
comment Zero-mean assumptions concerning r.d.'s when reading graduate-level probability texts
Does applying the mean-zero case to $X-{\bf E}X$ not answer this?
2d
reviewed Close Geometrically connected curve
2d
comment Geometrically connected curve
This question appears to be off-topic because it is solved by using a search engine
2d
reviewed Close state of art pseudo-boolean optimization solver
2d
comment Intuition behind $\zeta(2) = \frac{\pi^2}{6}$
Not everything in maths can be justified by a reason that feels "intuitive", and "intuition" is highly subjective
2d
reviewed Close Conformal map from a sector of unit disk onto upper half plane
2d
reviewed Close How to prove that the vertices of a convex hull are only defined by some specific subsets, in this particular case
2d
reviewed Close What should be considered a finite size of an infinite dimensional space?