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# Alexander Chervov

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## Registered User

 Name Alexander Chervov Member for 2 years Seen 2 hours ago Website Location Moscow Age 39
 10h awarded ● Nice Answer Jun11 asked Random walk - what are touch barrier probability and average touching time ? Jun3 comment How much one can earn on a white noise ? "Thus, the decision maker can concentrate only on the decision maximizing her single period profit. " This is somehow not very much obvious to me.... May be I just need to get accustomed to it. Jun3 comment How much one can earn on a white noise ? Hm, but why are you sure it is optimal strategy - naively I may think that I want: not just positive increment, but increment > threshold, i.e. I do not want to earn small money, but will wait for some "good" money. Jun3 comment How much one can earn on a white noise ? Waldemar, I am sorry, you are right. It seems you gave the answer I hoped, let me think for some time. Jun3 comment How much one can earn on a white noise ? Thank you, nevertheles I guess in this particular case the answer can be obtained without general theories. Jun3 comment How much one can earn on a white noise ? In this question I am intentionally consider NOT the increments to be N(0,1), but the price itself. Let us forget about - is it relevant to real world or not (I think it is relevant in "trend case"). The question is mathematically well-defined on its own. About the increments there is another question - "One can earn nothing on the Brownian motion, true ?" mathoverflow.net/questions/132581/… Jun2 comment One can earn nothing on the Brownian motion, true ? in the example Strategy 1 is exactly - keep until it is +1. But since I stop at fixed Time n=N. We may never get +1. Jun2 comment One can earn nothing on the Brownian motion, true ? It might be you are right. Let me think. Thank you. Jun2 comment How much one can earn on a white noise ? Related: mathoverflow.net/questions/132581/… "One can earn nothing on the Brownian motion, true ?" Jun2 comment One can earn nothing on the Brownian motion, true ? Related: mathoverflow.net/questions/132430/… "How much one can earn on white noise ?" Jun2 asked One can earn nothing on the Brownian motion, true ? Jun1 awarded ● Popular Question Jun1 comment How much one can earn on a white noise ? Steven trend plus noise model is approximation can be used to catch trends. There is no model which can be used universally. Jun1 comment famous papers/results by non professional mathematicians@fedja Notifier: you wrote in comment to my question: " the conjecture is, indeed, true for every symmetric distribution." please can you say more on that ? I would accept answer proving it. I am very interested. Jun1 comment How much one can earn on a white noise ? @fedja " the conjecture is, indeed, true for every symmetric distribution." please can you say more on that ? I would accept answer proving it. I am very interested. May31 revised How much one can earn on a white noise ? added 1109 characters in body; added 1 characters in body May31 comment How much one can earn on a white noise ? Thank you for your comments, it helps me to improve (hopefully) the question. I sincerely hope you will modify yours answer accordingly. May31 revised How much one can earn on a white noise ? deleted 1 characters in body; added 11 characters in body May31 asked How much one can earn on a white noise ? May27 accepted On Geometric Langlands Correspondence May26 answered On Geometric Langlands Correspondence May25 answered Why don’t more mathematicians improve Wikipedia articles? Apr28 comment Probability of random (0,1) Toeplitz matrix being invertibleIt does not depend on size n? Hmmm... Apr28 asked Mathematical properties of financial prices Apr23 accepted Inverse Hankel Transform Apr21 comment Examples of applications of the Freyd-Mitchell embedding theorem.What is multiplication on stable homotopy groups of spheres? (To make them ring? ) Apr10 accepted classification for coadjoint orbits of lower or upper triangular matrices Apr10 accepted A direct proof of the Harer-Zagier recursion enumerating the ways to paste a 2n-gon to get a genus g surface? Apr10 comment Finite Unipotent Groups: ReferencesAnd also mathoverflow.net/questions/127010/… classification for coadjoint orbits of lower or upper triangular matrices Apr10 answered classification for coadjoint orbits of lower or upper triangular matrices Apr9 revised Finite Unipotent Groups: Referencesadded 63 characters in body Apr9 revised Finite Unipotent Groups: Referencestag finite-groups Apr9 answered Finite Unipotent Groups: References Apr9 comment Finite Unipotent Groups: ReferencesAnd also mathoverflow.net/questions/68207/… irreducible-representations-of-the-unitriangular-group Apr9 comment Irreducible Degrees and the Order of a Finite Group Let me mention: mathoverflow.net/questions/108406/… Apr9 comment Representation theory of p-groups in particular upper tringular matrices over F_p Related question: mathoverflow.net/questions/126932/… Apr9 comment Finite Unipotent Groups: ReferencesRelated question mathoverflow.net/questions/106521/… in comments under it I have collected some references, which might be of interest Apr1 comment Darboux like theorem for non-degenerate 3-forms in 6-manifoldsWhat is nondegenerate? aa Apr1 comment Anick resolutionmathoverflow.net/questions/81415/… here is nice application given by Vladimir Dotsenko Mar29 revised P-group with abelian centralzertag Mar28 answered A direct proof of the Harer-Zagier recursion enumerating the ways to paste a 2n-gon to get a genus g surface? Mar20 revised Open problems in PDEs, dynamical systems, mathematical physicstags Mar17 comment $h$-adic Completion of $U_q(\frak{sl}_2)$?Second Cohomology of semisinple lie alg vanishes. So any deformation is trivial. So the two algs are isomorphic. Mar9 comment Role of applications in modern mathematicsMETA discussion meta.mathoverflow.net/discussion/1551/… Mar7 comment Role of applications in modern mathematicsThank you for the answer. My question is about applications of math outside math. I do not see the sense of specifying the "application" very precisely - hope everybody understands vague meaning and that is enough. I "assume a good will" - if some one thinks it is worth to write an in the answer about what he thinks deserves to be shared with the community - go on... Mar6 asked Role of applications in modern mathematics Mar2 revised Generators of p-groupstag Mar1 comment D-modules as quantization of modules on cotangent bundlelook also at quantization of lagrangian submanifolds Feb26 comment Statistical properties of principal components and their convergence rates.Be aware of stats.stackexchange.com