![abstract algebra - Why is commutativity optional in multiplication for rings? - Mathematics Stack Exchange abstract algebra - Why is commutativity optional in multiplication for rings? - Mathematics Stack Exchange](https://i.stack.imgur.com/UyIXV.jpg)
abstract algebra - Why is commutativity optional in multiplication for rings? - Mathematics Stack Exchange
![Sam Walters ☕️ on Twitter: "The Weyl algebra cannot be embedded inside a Banach algebra. (Not hard to show using its simplicity in the sense of ring theory.) #math #algebra #topology https://t.co/rXhxxYrf0j" / Sam Walters ☕️ on Twitter: "The Weyl algebra cannot be embedded inside a Banach algebra. (Not hard to show using its simplicity in the sense of ring theory.) #math #algebra #topology https://t.co/rXhxxYrf0j" /](https://pbs.twimg.com/media/EdgYQyaVcAAv3Ba.jpg)
Sam Walters ☕️ on Twitter: "The Weyl algebra cannot be embedded inside a Banach algebra. (Not hard to show using its simplicity in the sense of ring theory.) #math #algebra #topology https://t.co/rXhxxYrf0j" /
![Sam Walters ☕️ on Twitter: "Two quick examples of local rings (one commutative, one non-commutative). (The first one I thought up, the second is known from complex variables theory.) References. [1] S. Sam Walters ☕️ on Twitter: "Two quick examples of local rings (one commutative, one non-commutative). (The first one I thought up, the second is known from complex variables theory.) References. [1] S.](https://pbs.twimg.com/media/FHzl9ZGVEAAlL0e.jpg)