Rod Carvalho
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 Sep 23 comment What's the probability that I will earn \$25? You can use Markov chains to model this problem. Take a look at: mathpages.com/home/kmath084/kmath084.htm Sep 22 comment Boy and Girl paradox @Gerenuk: One picks the uniform probability mass function (pmf) because it maximizes entropy. Thus, if we have no information at all, we assume a uniform pmf over$\Omega$. If you tell me that one of the children is a boy, then one of the points in the sample space is eliminated and the pmf is updated as we assume a uniform pmf over$\Omega'$. This is a Bayesian interpretation of the problem. Would be interesting to think of a Frequentist interpretation. Sep 22 answered Mathematics and musical instruments Sep 22 revised Why am I not getting an infinite limit? Fixed LaTeX Sep 22 suggested approved edit on Why am I not getting an infinite limit? Sep 22 revised calculus of variations question added boundary conditions Sep 22 answered How to convert 601.0 to IEEE-754 Single Precision Sep 22 suggested approved edit on calculus of variations question Sep 22 comment Boy and Girl paradox @Gerenuk: By "first child" and "second child" I meant "1st child that was born" and "2nd child that was born", i.e., I was referring to chronological order. The order in which you observe them does not change their dates of birth ;-) Sep 22 comment How to divide currency? @Auke: Ill-posed problems cannot be answered mathematically, but one can point out why they're ill-posed and try to steer the OP towards well-posed problems. I suggested a cost function at least. You just whine. If you dislike my answer so much, just downvote it. Sep 22 comment How to divide currency? @Auke: The question was not mathematical either, given the OP's lack of definition of "optimal". Garbage in, garbage out... Sep 22 revised calculus of variations question Fixed LaTeX, improved the text, corrected misconceptions Sep 22 suggested approved edit on calculus of variations question Sep 22 comment calculus of variations question @mimi: Have you tried using the Euler-Lagrange equations? en.wikipedia.org/wiki/Euler%E2%80%93Lagrange_equation Sep 22 comment calculus of variations question Equation? What equation? I see none. Moreover, what are the limits of integration? You should integrate from$a$to$b\$ so that you obtain a scalar instead of a function, which is what a functional does. Sep 22 revised Sphere tangent to a plane Fixed LaTeX and typos Sep 22 suggested approved edit on Sphere tangent to a plane Sep 22 revised Boy and Girl paradox deleted 5 characters in body Sep 22 revised Boy and Girl paradox added 28 characters in body Sep 22 answered Boy and Girl paradox