Top network posts

• 47 Prove that if V is finite dimensional then V is even dimensional?
• 10 A kind of converse to the Jordan curve theorem
• 8 Tangent bundle of sphere as a complex manifold
• 7 If the cubic polynomial with rational coefficients $x^3+ax^2+bx+c$ has a double root, the root is rational.
• 6 A ring isomorphic to a proper subring of itself
• 6 Can $\mathbb{Z}/6\mathbb{Z}$ act freely and properly discontinuously on $\Sigma_4$?
• 6 Every compact semi-simple Lie group has finite center
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