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Jan
2
comment Inequality for line integral
Yes you're right. $\int_0^1 f(t)|c'(t)| dt =\int_C f dx$ for any scalar function along a curve $c$.
Dec
30
comment Length of a Curve and Area of Torus
Yor are right for the last calculation and the second term of $N$. I editted.
Dec
30
revised Length of a Curve and Area of Torus
added 1 character in body
Dec
30
revised Length of a Curve and Area of Torus
added 2 characters in body
Dec
30
comment Length of a Curve and Area of Torus
I add more explanation
Dec
30
revised Length of a Curve and Area of Torus
added 159 characters in body
Dec
30
answered Length of a Curve and Area of Torus
Dec
30
revised Length of a Curve and Area of Torus
added 25 characters in body
Dec
29
revised Inequality for line integral
added 37 characters in body
Dec
29
comment Inequality for line integral
I add more explanations
Dec
29
revised Inequality for line integral
added 743 characters in body
Dec
29
answered Inequality for line integral
Dec
29
comment Commuting permutations
If $\tau =\sigma$ has order $2$, then $\phi $ has order $1$
Dec
29
revised A sequence $(a_n)$ where $\exists M>0$ such that $\forall n\in\mathbb{N}$, $\sum\limits_{k=1} ^n |a_{k+1}-a_k|\leq M$. Show $(a_n)$ is Cauchy sequence
deleted 10 characters in body
Dec
29
answered A sequence $(a_n)$ where $\exists M>0$ such that $\forall n\in\mathbb{N}$, $\sum\limits_{k=1} ^n |a_{k+1}-a_k|\leq M$. Show $(a_n)$ is Cauchy sequence
Dec
9
awarded  Caucus
Nov
28
comment Prove $ \sin\ (\alpha'+\beta'+\gamma')\cos\ \beta \geq \sin\ \alpha' \cos\ \gamma+ \sin\ (\beta'+ \gamma')\cos\ (\alpha+\beta )$
I see. Thank you.
Nov
27
comment Prove $ \sin\ (\alpha'+\beta'+\gamma')\cos\ \beta \geq \sin\ \alpha' \cos\ \gamma+ \sin\ (\beta'+ \gamma')\cos\ (\alpha+\beta )$
Note that $$ \cos\ \beta\geq (\sin\ \alpha'-\cos\ \alpha')\cos\ \gamma $$ Not true is not clear.
Nov
27
asked Prove $ \sin\ (\alpha'+\beta'+\gamma')\cos\ \beta \geq \sin\ \alpha' \cos\ \gamma+ \sin\ (\beta'+ \gamma')\cos\ (\alpha+\beta )$
Nov
7
revised Group Action problem - Proving an action and finding number of orbits
added 53 characters in body