Maybe an even more accessible example is Z x Z? Again, the diagonally embedded copy of Z is a subring that's not an ideal.
April 19, 2024 at 8:02 AM
Maybe an even more accessible example is Z x Z? Again, the diagonally embedded copy of Z is a subring that's not an ideal.
How about Z/2Z x Z/2Z? Then {(0,0), (1,1)} is a subring that's not an ideal, right?
April 19, 2024 at 8:01 AM
How about Z/2Z x Z/2Z? Then {(0,0), (1,1)} is a subring that's not an ideal, right?
Other than that I know nothing yet
April 19, 2024 at 7:54 AM
Other than that I know nothing yet
It is playing at the SF film festival in just over a week sffilm.org/event/counte...
April 19, 2024 at 7:54 AM
It is playing at the SF film festival in just over a week sffilm.org/event/counte...
[Schools and democracy]
April 17, 2024 at 7:32 AM
[Schools and democracy]