crf

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72 Posts

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Oct
21
 asked Either find an example of a differentiable downward-sloping function $p$ such that $\frac{d}{dx}[p(x)+xp'(x)]<0$
Oct
18
 asked Is there a quicker, nicer way to show that the union of compact sets is not necessarily compact?
Sep
28
 asked Proving Schwarz inequality for complex numbers using calculus
Sep
20
 asked I've been puzzling for two days now: how to prove, basically, that $b^x$ is increasing in $x$? (Rudin Chapter 1, problem 6)
Sep
17
 asked How to prove that there exist a concave function and $\gamma\in[0,1]$ and some other numbers which satisfy an inequality
Sep
12
 asked Interesting or non-obvious finite subsets of the natural numbers
Sep
11
 answered Does ((2^2)^2)^2… = 1 or 0?
Sep
6
 asked Is the “field” I learned about in analysis different from the “field” I learned about in econometrics?
Sep
4
 asked Help understanding $e^{it}=\cos t+i\sin t$ by way of matrices and vector fields
Aug
31
 asked From which areas of mathematics does consumer theory in microeconomics spawn?
Aug
15
 answered Prove that - for every positive $x \in \mathbb{Q}$, there exists positive $y \in \mathbb{Q}$ for which $y \lt x$
Aug
14
 asked What is it about modern set theory that prevents us from defining the set of all sets which are not members of themselves?
Aug
13
 asked Find the probability that the second customer to arrive has to wait to be served if arrival time is exponential and serving time is uniform
Aug
13
 answered A tricky but silly doubt regarding the solutions of $x^2/(y-1)^2=1$
Aug
13
 answered Proof that $1$ is the least natural number using the Principle of Well Ordering
Aug
11
 asked Let X and Y be random variables with joint pdf $f(x,y)=x+y$ for $0<x<1$ and $0<y<1$. Are X and Y independent? My heart says yes but my math says no.
Aug
11
 answered Subgame Perfect Nash Equilibrium
Aug
7
 asked Is this a legitimate way to show that $[-ze^{-z^2/2}]_{-\infty}^{\infty}=0$? (Proving a statement about a function of a normal random variable)
Jul
31
 asked Show that if X is a discrete random variable such that for nonnegative integers m,n, $P(X>m+n|X>m)=P(X>n)$, then X is geometric
Jul
18
 asked Why do these two methods of calculating the probability of winning a best-of-7 series give the same answer?
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