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As somebody used to say:

Does research. Smokes. Battles administration. Smokes. Wishes he could stop battling administration so that he could have more time to do research. Smokes some more.

The same. Except I do not smoke.


How to ask a good question?

This paragraph is for my personal use but freely available:

Welcome to Math.SE! Please, consider updating your question to include what you have tried and where you are getting stuck. That way, people on this site will know exactly what help you need.


May
6
comment How do we show that $x^5y^3 + x^4y^4 + x^3y^5$ is $\Omega(x^3y^3)$
The inequality holds for $x,y\geqslant1$, not $x,y\gt0$.
May
6
revised Limit theorem of Markov chains applied to higher order Markov chains
edited title
May
6
comment Mystery about $\sum_{n\geqslant 1}2^{-n!}$
"Cleaner and more helpful" to explain the gaps in the decimal expansion? I doubt that... (For the record, @Hagen's answer mentions the crucial arguments.) Anyway, now the explanation is in the comments, and even in the answer, so everything is fine.
May
6
comment Prove that $x-1$ divides $x^n-1$
@Alex What do you mean?
May
6
comment Prove that $x-1$ divides $x^n-1$
@Alex No. $ $ $ $
May
6
revised Show that the sum can be written as:
added 2 characters in body; edited tags; edited tags
May
6
comment Limit theorem of Markov chains applied to higher order Markov chains
There is no rho formula, rho(x) is just a notation for the sum on the RHS of the equation introducing the notation. // Sorry but I do not really understand the alternative you explain in the last sentence. Whichever estimation procedure one uses, in the end the MLE for pi(x,y) is the fraction of time the observed sequence spends at x-then-y and the MLE for rho(x) is the fraction of time the observed sequence spends at x.
May
6
revised Limit theorem of Markov chains applied to higher order Markov chains
added 290 characters in body
May
6
comment Limit theorem of Markov chains applied to higher order Markov chains
Would it be correct to... Yes. // extrapolate the frequencies of x in A... See Edit.
May
6
revised Limit theorem of Markov chains applied to higher order Markov chains
added 566 characters in body
May
6
answered Limit theorem of Markov chains applied to higher order Markov chains
May
6
comment The probability distribution for the number of times one must sample without replacement prior to finding a target
The point is that one is not supposed to erase one's footprints like you did, if only for the sake of future readers (and sorry but "offense" is quite offtopic here).
May
6
comment Mean Value Theorem: application
@GerryMyerson Indeed. Or simply the fact that $t\mapsto f(2+t)$ is even (and differentiable).
May
6
comment Problem # 25, page 95, from Stein and Rami
My last comment suggested you show some personal work. You do not. What more can I say?
May
6
comment Problem # 25, page 95, from Stein and Rami
Please show a minimal amount of personal work so that people can get convinced you are not using the site as an automata for solutions.
May
6
revised Problem # 25, page 95, from Stein and Rami
added 4 characters in body; edited title
May
6
comment pdf of a simple random variable calculated two different ways.. with two different answers
The answer to the question asked is in the remark.
May
6
comment uniform integrability characterization
What is the definition of uniform integrability that you were given? There are usually two parts in it, which part are you unable to show? (That you flout the rules of the site so squarely after 78 questions asked is worrisome.)
May
6
comment Mystery about $\sum_{n\geqslant 1}2^{-n!}$
IanMateus As a "typical teenager" (your profile), could you explain why you accepted the accepted answer? For the example in the first paragraph? For the second paragraph? For both?
May
6
comment The probability distribution for the number of times one must sample without replacement prior to finding a target
Why do you erase your comments after I answered them? Why do you modify your post after it was discussed in the comments? Such a heavy (and silent) rewriting is not how the site is supposed to function.