Hi

Let be a ring, such that . Suppose that is finite.

Prove that

We can see that , so if , it's over.

Any idea? :)

Printable View

- Nov 16th 2008, 06:09 AMclic-clacinvertible?
Hi

Let be a ring, such that . Suppose that is finite.

Prove that

We can see that , so if , it's over.

Any idea? :) - Nov 16th 2008, 10:52 AMNonCommAlg
- Nov 16th 2008, 11:16 AMclic-clac
Thanks for your answer.

I don't see why there exists such that .

The conclusion is still the same with for a but there is something I'm missing... - Nov 16th 2008, 11:47 AMNonCommAlg
- Nov 16th 2008, 12:13 PMclic-clac
You're welcomed.

But for me the problem is that doing this, we assume that every element of is equal to a , .

Why can we say that? - Nov 16th 2008, 12:23 PMNonCommAlg
- Nov 16th 2008, 12:42 PMclic-clac
Great NonCommAlg, I finally got it! Thank you.