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location Albany, CA
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visits member for 2 years, 6 months
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If I see further than most, it is because I have stood on the toes of giants and they kicked me high into the air...

However, there is nothing to suggest that I see further than most.

I am (inasmuch as one 'is' an occupation) an engineer. My mathematical skills are rather pedestrian, with a rare insight every now and then. I have been lucky enough to sit in the same room with some famous mathematicians & engineers. My Erdős number is 5, which undoubtedly makes me as unique as an Irishman in a pub. And I have been spotted in The Pub from time to time.

In professional circumstances, my value add has usually been the injection of common sense and completion of grunt work when perspectives and energies are unfocused.

My current age is the smallest number composed of the first two primes that would allow me to have watch on RTÉ the slightly contradictory small step for man and giant leap for mankind.

My real name is Joe Higgins. Apparently, my last name means 'of the Viking' in Irish.

My alma mater is University College, Cork in Ireland, and I had the additional privilege of obtaining my Phd. from the University of California at Berkeley under the enlightened tutelage of Lucien Polak.

I can be reached at joe dot higgins at gmail dot com.


Mar
12
comment Norm of a Matrix-vector product
I don't understand what you are asking.
Mar
12
comment how to prove that $\sum_{k=1}^{m}k!k=(m+1)!-1$ without induction?
+1: Very nice. ${}{}{}$
Mar
12
comment Translation of smooth curves
$t \mapsto t+it^2$ will work.
Mar
12
comment Algorithm to find an orthogonal basis (orthogonal to a given vector)
The onus is on you to test, you get what you pay for.
Mar
12
answered Algorithm to find an orthogonal basis (orthogonal to a given vector)
Mar
12
answered Finding change of coordinates matrix?
Mar
12
comment How prove this ordinary equations $x''+2ax'+x=f(t)$ has a unique $2\pi$-periodic solution if and only if $a\neq 0$
@LutzL: That would be assuming (rather than proving) existence.
Mar
12
answered Intersection of strictly monotone, convex functions on interval with two given intersections
Mar
12
answered How can I solve Dynamic Problem?
Mar
12
answered If $S$ is an isometry, why is $\sqrt{S^{*}S}$ a positive and hence self adjoint operator?
Mar
12
comment The Jezebel probability
Why the downvote? At least, why the selective downvote?
Mar
12
answered Why is the projection of a closed polytope closed?
Mar
11
comment Why is the projection of a closed polytope closed?
This is not true. The set $\{ (x,y) | y(1-|x|) \ge 1 \} \cap ([-1,1] \times \mathbb{R}^2)$ is closed but the projection onto the $x$ axis is $(-1,1)$ which is not.
Mar
11
comment Air friction question
Try physics.stackexchange.com
Mar
11
comment Odd Laurent Series
If a function is analytic on some disc, then the Laurent and Taylor series will be the same.
Mar
11
answered The Jezebel probability
Mar
11
revised How do i prove that continuous linear transformation between normed spaces is bounded?
added 6 characters in body
Mar
11
answered How do i prove that continuous linear transformation between normed spaces is bounded?
Mar
11
comment I want to pursue Computer Science as a major but I don't know if i should…HELP!?
It is hard to give personal advice to someone you don't know.
Mar
11
comment Odd Laurent Series
A Laurent series does not exist for $|z| \ge 2$ as $f$ is multivalued there...