https://marginalnotesmaths.blogspot.com/
Last Thursday I told the students as a fact (no proof) that every nonzero ring (commutative with 1) has a maximal ideal. I added that anyone wanting more info should search “abstruse goose zornaholic”.
Last Thursday I told the students as a fact (no proof) that every nonzero ring (commutative with 1) has a maximal ideal. I added that anyone wanting more info should search “abstruse goose zornaholic”.
functions defined on every open subset
one can restrict and glue them
If f,g are functions, then f+g, f-g and fg are also functions
If f is a function on U open
f(p) exists for p\in U
D(f) :={p in U s.t. f(p)≠0} is open in U
1/f is a function on D(f).
(typo fixed)
functions defined on every open subset
one can restrict and glue them
If f,g are functions, then f+g, f-g and fg are also functions
If f is a function on U open
f(p) exists for p\in U
D(f) :={p in U s.t. f(p)≠0} is open in U
1/f is a function on D(f).
(typo fixed)
Plus in general my eyesight isn’t that great.
On the other hand, I can “see“ what others cannot.
Plus in general my eyesight isn’t that great.
On the other hand, I can “see“ what others cannot.