Reputation
12,404
Next privilege 15,000 Rep.
Protect questions
Badges
8 30 75
Newest
 Revival
Impact
~253k people reached

8h
reviewed Leave Closed Mathematical function to simulate growth of customers
Jul
2
reviewed Leave Closed This n can not be odd
Jul
2
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
added 1 character in body
Jun
29
reviewed Leave Closed Is there something interesting about $373857714078$?
Jun
28
reviewed Leave Closed understanding uv coordinates integral bounds
Jun
26
reviewed Leave Closed absolute deviation for binomial distribution
Jun
25
reviewed Reopen Easy math proofs or visual examples to make high school students enthusiastic about math
Jun
25
awarded  Revival
Jun
25
comment why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
@OfirSchnabel: It depends. There are different possibilities for the proof of the Jordan normal form in a linear algebra course. Sometimes, the full classification of modules over PIDs is done, having the Jordan normal form as a corollary. (The time needed to do this is comparable with the "classical" proof. However, it is even more abstract and harder to follow, which makes it a debatable option for a freshman course.) In this case, all the needed groundwork is there.
Jun
25
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
added 206 characters in body
Jun
25
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
edited tags
Jun
25
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
added 224 characters in body
Jun
25
comment why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
@OfirSchnabel: I've added a bit more info on the theoretical background. Just open your favorite book on abstract algebra and look for the classification of finitely generated modules over principal ideal rings. The rational canonical form should follow closely behind.
Jun
25
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
added 224 characters in body
Jun
25
awarded  Nice Answer
Jun
25
answered why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
Jun
25
revised why similarity over $\bar{\mathbb{F}}$ of $A,B\in M_n(\mathbb{F})$ implies similarity over $\mathbb{F}$?
edited body
Jun
25
revised Reference request: groups of order $p^4$.
edited tags
Jun
25
comment Easy math proofs or visual examples to make high school students enthusiastic about math
This question is related: math.stackexchange.com/q/501320/61691
Jun
25
revised Help with some simpler symmetric group $S_n$ problems.
edited tags