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seen Jan 31 '13 at 23:59

Jan
25
asked How can I prove that “If $M$ is contractible differentiable manifold, then $M$ is orientable?”
Jan
20
comment How calculate the De Rham cohomology group of $3$-torus: $T^3$?
@user32240: thanks!
Jan
20
comment How calculate the De Rham cohomology group of $3$-torus: $T^3$?
Why $H^1(T^2 \times I)\rightarrow H^2(X)$ has a one dimensional image?
Jan
20
comment How calculate the De Rham cohomology group of $3$-torus: $T^3$?
i didn't how to use partition of unity? can you detail, please? But thanks you for answer.
Jan
20
comment How calculate the De Rham cohomology group of $3$-torus: $T^3$?
Yeah, Jason DeVito
Jan
19
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Jan
19
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Jan
19
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Jan
19
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Jan
19
revised How calculate the De Rham cohomology group of $3$-torus: $T^3$?
added 53 characters in body
Jan
19
reviewed Approve suggested edit on How calculate the De Rham cohomology group of $3$-torus: $T^3$?
Jan
19
asked How calculate the De Rham cohomology group of $3$-torus: $T^3$?