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visits member for 2 years, 2 months
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cs student


Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
May
21
awarded  Yearling
May
15
suggested suggested edit on Why is cos(90)=0.4 in WebGL?
May
5
suggested suggested edit on How to calculate the pullback of a $k$-form explicitly
May
1
comment Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
@DavideGiraudo My intuition was telling me that the statement would hold for any general $X$. How could I prove the result for $X=R^n$ and find a simple counterexample for a general $X$? Thank you.
Apr
30
comment Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
@DavideGiraudo Clarified in the edit.
Apr
30
revised Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
added 100 characters in body
Apr
30
comment Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
@CameronWilliams Is it better? I considered the version with symbols more precise and succinct and cannot formulate a much better title in English.
Apr
30
revised Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
added 113 characters in body; edited title
Apr
30
asked Does a convergent sequence of measurable functions approximate the open set arbitrarily precisely in measure?
Apr
25
accepted Functions with a zero derivative form an ideal of $C^\infty(\mathbb{R}^n)$
Apr
25
asked Functions with a zero derivative form an ideal of $C^\infty(\mathbb{R}^n)$
Apr
13
accepted Lee, Introduction to Smooth Manifolds Solutions
Apr
12
comment $X \in T_pM$, there is a smooth vector field $\tilde X$ on $M$ such that $\tilde X_p=X$
@user86418 Thank you for the clarification, I think my confusion was that although $\frac{\partial}{\partial x^i}$ to $\frac{\partial}{\partial y^i}$ gives an isomorphism between the tangent spaces, the tangent vectors $\frac{\partial}{\partial x^i}$ and $\frac{\partial}{\partial y^i}$ are not necessarily the same ones.
Apr
12
comment Lee, Introduction to Smooth Manifolds Solutions
@user10444 I included a reference request tag. I think that if the solutions are available then it is more efficient for the community if the asker tries to solve the problem with the solutions before asking someone else to reproduce them again.
Apr
12
comment Lee, Introduction to Smooth Manifolds Solutions
@JackLee I am sorry to read this. I would not be committing a crime in public. The amount of the help I got from the first edition deserves its appreciation - I have bought the 2nd edition of your ebook now.
Apr
11
asked Lee, Introduction to Smooth Manifolds Solutions
Apr
9
accepted A set with a supremum and an infinum inside
Apr
5
comment $X \in T_pM$, there is a smooth vector field $\tilde X$ on $M$ such that $\tilde X_p=X$
@user86418 I made an explicit distinction in an edit between the coordinates. Now $\tilde X$ is defined for all $p \in M$ as for every $p$ there is some chart $(V,\psi)$ such that $p \in V$.