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 May11 answered How to show stochastic differential equation is given by an equation May10 comment No arbitrage iff there EMM $P^*$ theorem Well, straight from the definitions above, a type A arbitrage is also a type B arbitrage. In fact, if we have a strategy giving a positive initial cashflow, see that we could alter the strategy slightly, by investing the amount obtained at time 0 in the risk-free asset. This will give $V_0 = 0$, and it is a type B arbitrage. I'm not exactly sure if this is what you are looking for, since I haven't seen the proof. May10 answered No arbitrage iff there EMM $P^*$ theorem Apr23 comment Geometric brownian motion - Ito's lemma They should be corrected now. Apr23 revised Geometric brownian motion - Ito's lemma Corrected all the errors Apr23 comment Geometric brownian motion - Ito's lemma @Ian you are absolutely correct. There are just so many errors. Haha. Sorry for that. Apr23 answered Geometric brownian motion - Ito's lemma Apr12 answered Finding the probability of loss from standard deviation in normal distribution Mar28 awarded Yearling Sep24 awarded Autobiographer Aug16 awarded Commentator Aug16 comment How to measure power spectral density in matlab? Thanks, both of you. I have added the Signal Processing-tag. If I use the above code, what should then be the unit of the x-axis? Note that this question is actually an exact duplicate of this question, which I have posted to get the most peoples attention. If you have any comments, here or there, please let me now. Aug16 revised How to measure power spectral density in matlab? edited tags Aug15 asked How to measure power spectral density in matlab? Aug14 comment Non integral degree derivatives I'm afraid not. But you might want to add that to your question. I just remembered seeing this a while ago, so it was quite easy for me to search for right now. But I have no experience with it whatsoever.:( Aug14 answered Non integral degree derivatives Aug8 answered Obtain a grammar for the language (i) L = {a ^m b ^n ; m ≠ n ; m , n > 0 } Aug8 awarded Supporter Jun27 comment Is there any mathematical theory behind sudoku? I know this is probably not what you're looking for, but check out this article describing the connection between the solution of sudokus and CAT scans, via the Radon Transform. In my opinion, that is really quite incredible! Jun25 awarded Editor