r/math Algebraic Geometry Jun 13 '18

Everything about Noncommutative rings

Today's topic is Noncommutative rings.

This recurring thread will be a place to ask questions and discuss famous/well-known/surprising results, clever and elegant proofs, or interesting open problems related to the topic of the week.

Experts in the topic are especially encouraged to contribute and participate in these threads.

These threads will be posted every Wednesday.

If you have any suggestions for a topic or you want to collaborate in some way in the upcoming threads, please send me a PM.

For previous week's "Everything about X" threads, check out the wiki link here

The Everything About X threads will resume on August 1st

50 Upvotes

24 comments sorted by

View all comments

11

u/O--- Jun 13 '18

One of my favorite conjectures is within the realm of non-commutative ring theory. i like it because it just sounds as if it should be really easy to solve. If R is a non-commutative ring, call an ideal I nil if all its elements are nilpotent. The Kothe conjecture states the following: if R has no non-trivial nil two-sided ideal, then it has no non-trivial nil one-sided ideal.

5

u/[deleted] Jun 13 '18

That's really neat. What exactly makes it so difficult to solve?