# Tag Info

Accepted

• 2,102
Accepted

### Abelianization of general linear group of a polynomial ring

There is a discussion on whether $K$ has two elements or is larger, which strongly affects the conclusion. One has the determinant map $\mathrm{GL}_2(K[X])\to K^*$. To show that it's the ...
• 51.8k
Accepted

### Is Lie group cohomology determined by restriction to finite subgroups?

After the heavy lifting done by people on MSE and in the comments, I think it's not too bad to finish off the proof that the answer is yes. As argued by Ben Wieland in the comments, we reduce to ...
• 49.7k