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Jan
21
answered What does $H X H^T$ do?
Jan
20
answered What is the equation for this wave?
Jan
14
answered Given change in proportions and assuming minimum movement and a direction, calculate minimum proportion moving in that direction
Jan
13
asked If there are $n$ $Y$'s for every $X$, but $m$ $X$'s for every $Y$, then the total number of $Y$'s is $n/m$ times the number of $X$'s?
Jan
13
answered Connections between the solution of simple ordinary equation, normal distribution and heat equation
Jan
8
answered If my average speed is 50 mph, is it better to go 10% faster or 5 mph faster? (These are not the same)
Jan
6
answered Optimal way of visiting each metro station of Montreal
Jan
5
answered Can one always map a given triangle into a triangle with chosen angles by means of a parallel projection?
Jan
4
answered The “find my car” problem: proper interpretation and solution?
Dec
30
answered Geometrical interpretation of $\pi=\int_0^1\frac{4}{1+x^2}dx$.
Dec
29
answered Maximize ratio of logarithms
Dec
28
answered Solving min-max optimization problems in original ways (that is, avoiding the frenzy of differentiation)
Dec
26
answered Mean of a vector
Dec
19
answered Space formed by dot products of three vectors
Dec
15
answered Number of samples needed to get a given expected distance
Dec
14
answered How can I recursively approximate a moving average and standard deviation?
Dec
1
answered Optimization of competitive scenario
Nov
25
answered An example of a continuous function on $\mathbb R^2$ with two critical points, both of them minima
Nov
23
asked If the difference of two i.i.d. random variables is normal, must the variables themselves be normal?
Nov
23
answered Distribution of difference of points in same tail of normal curve?