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Sep
23
asked Simplify $\frac{\prod \limits_{j=1}^{n}j}{\prod \limits_{i=p+1}^{n-1}i\cdot \prod \limits_{k=1}^{p}j}$?
Sep
23
comment Why is $\frac{2n!}{n^2+n}=2(n-1)!$?
Yes. My mistake. Thanks for the help. :-)
Sep
23
accepted Why is $\frac{2n!}{n^2+n}=2(n-1)!$?
Sep
23
asked Why is $\frac{2n!}{n^2+n}=2(n-1)!$?
Sep
18
awarded  Famous Question
Sep
17
awarded  Nice Question
Sep
13
revised What are the non-obvious corollaries that are proved with the mean value theorems?
edited title
Sep
13
asked What are the non-obvious corollaries that are proved with the mean value theorems?
Aug
29
accepted Conflicting definition of eulerian graph and finite graph?
Aug
29
awarded  Famous Question
Aug
29
comment Conflicting definition of eulerian graph and finite graph?
Take this example, is it a finite graph? It has an even number of vertices with odd valency, but it also has an odd number of vertices with odd valency.
Aug
29
comment Conflicting definition of eulerian graph and finite graph?
Now I get it. It could - for example - have 15 vertices but only two of them having odd valency. Now I understand.
Aug
29
comment Conflicting definition of eulerian graph and finite graph?
@N.S. But if it has 3 vertices, can it still be called a finite graph?
Aug
29
comment Conflicting definition of eulerian graph and finite graph?
Even number of vertices with odd valency. Doesn't it mean that each vertex has odd valency?
Aug
29
asked Conflicting definition of eulerian graph and finite graph?
Aug
27
accepted Use $\sin^22t=4\sin^2t(1-\sin^2 t)$ to show that $\sin t$ is not a polynomial?
Aug
26
asked About the convenient rewriting of formulas of sequences?
Aug
26
asked Use $\sin^22t=4\sin^2t(1-\sin^2 t)$ to show that $\sin t$ is not a polynomial?
Aug
11
asked Where can I read about the techniques for computing areas and volumes before calculus?
Aug
10
asked Is the area of a convex polygon equal to the area of a circle with the same perimeter of the polygon?