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Aug
14
reviewed No Action Needed Need help in this proposition
Aug
12
reviewed Looks OK Computing orthogonal projection onto range space of a given matrix
Aug
12
comment Algebraic Issue
As currently written, $X_1$, $X_2$, $Y_1$, and $Y_2$ are irrelevant and there are an infinite number of solutions. Are you sure you haven't missed something out of the question?
Aug
12
reviewed Leave Open Lower bound for quotient sets
Aug
10
comment ratio of alcohol to water
Note that there's probably an unspoken assumption that if you remove 5 litres of alcohol and add 5 litres of water you end up with the starting volume of 15 litres. This isn't quite true, so beware limitations of the model.
Aug
10
comment Is there an algorithm for determining when two graphs are isomorphic?
Technically you should include a test that the two graphs have the same number of vertices, as adding a disconnected vertex wouldn't change the integer you've defined.
Aug
9
reviewed Reviewed Streaming algorithm for polynomial fitting data?
Aug
9
revised Streaming algorithm for polynomial fitting data?
Inline the key part in case the link dies
Aug
9
reviewed Close What i am doing wrong here . and if i am correct then can any one explain to me how $1=-1$
Aug
8
reviewed Leave Open Geometry to the inhabitants of a particular space
Aug
6
reviewed Approve When to Stop Using L'Hôpital's Rule
Aug
4
comment Dijkstra's Shortest-Path Algorithm
No need for a negative cycle. It suffices to present an example for which $g(v) = 0$ is not an admissible heuristic for A*.
Aug
4
reviewed Close How prove this integral $\int_{0}^{\frac{\pi}{2}}x^2\sqrt{\tan{x}}\sin{2x}dx$
Aug
3
comment Are all finite fields isomorphic to $\mathbb{F}_p$?
Is there some special property of finite fields which gives a shorter or more elegant solution to the exercise than "By Lagrange's theorem"?
Aug
2
comment The odds of studying versus applying a mathematics?
This isn't actually the question discussed on meta. That question was arguably off-topic but best answered by mathematicians. This question appears to be best answered by the careers department of your university. Ask them what statistics they have on what their recent M.M. graduates are doing.
Jul
31
comment Logic problem, proposed by Euler
The key sentence of the problem statement has been mangled (in translation, perhaps) and makes no sense whatsoever. That makes it rather hard to check your conversion into equations.
Jul
30
reviewed Close How would you calculate the Tangent without a calculator?
Jul
29
reviewed Reject How to solve this system for real $x,y,z$
Jul
28
answered Can you get the exact real value of $ \left((-1)^{\frac{1}{180}}\right)^{89}-\left((-1)^{\frac{1}{180}}\right)^{91}$?
Jul
26
comment What is the maximum of the self root $f(x) = x^{1/x}$
I don't see where you demonstrated that $x=e$ gives a maximum as opposed to a minimum or a saddle-point.