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6 votes

Homotopy problem for infinite dimensional topological space

As Dan pointed out, this is wrong in general, but there are situations where an approximation result does hold. One example for such results is due to Palais ('On the homotopy type of certain groups o …
Johannes Ebert's user avatar
30 votes
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Are infinite dimensional constructions needed to prove finite dimensional results?

Any compact Lie group admits an embedding into a large linear group $GL_n (\mathbb{C})$. I think it is no question that this is a genuinely finite-dimensional and important statement. The proof is vi …
Johannes Ebert's user avatar