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Jason DeVito earned this badge 25 times |
may 6 at 16:14
If $f: M\to M$ an isometry, is $f$ bijective?
mar 17 at 14:24
Smooth Poincaré Conjecture
jan 31 at 17:26
Are there any compact embedded 2-dimensional surfaces in $\mathbb R^3$ that are also flat?
dec 20 at 9:13
Functions with no closed-form derivative
nov 26 at 14:19
Rank of skew-symmetric matrix
jul 14 at 0:35
Sequences in Non-Hausdorff Spaces
jun 2 '12 at 19:55
Is it true that fundamental group of a manifold with boundary can't be simple? If so, why?
may 5 '12 at 7:10
What is the definition of $2.5!$? (2.5 factorial)
mar 5 '12 at 6:20
If $f(x)=f'(x)+f''(x)$ then show that $f(x)=0$
feb 22 '12 at 15:49
Can there exist a non-constant continuous function that has a derivative of zero everywhere?
dec 8 '11 at 18:17
Sum of infinite divergent series
nov 29 '11 at 17:35
Can every group be represented by a group of matrices?
nov 25 '11 at 15:58
Why isn't $\mathbb{CP}^2$ a covering space for any other manifold?
sep 8 '11 at 9:06
Little Bézout theorem for smooth functions
may 12 '11 at 13:41
Ways in which a manifold can be geodesically incomplete
feb 27 '11 at 2:22
First-Order Logic vs. Second-Order Logic
dec 1 '10 at 17:51
Partitioning an infinite set
nov 30 '10 at 18:01
Is there an easy way to show which spheres can be Lie groups?
nov 13 '10 at 21:09
Why is $\omega$ the smallest $\infty$?
aug 17 '10 at 11:28
A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language
aug 2 '10 at 13:30
Are there more rational numbers than integers?
