Reputation
54,246
Next tag badge:
378/400 score
170/80 answers
Badges
9 48 126
Newest
 Revival
Impact
~703k people reached

3h
answered Universal property of natural number semi-ring
10h
comment For fractional ideal $I$ why is $I\cap R \supsetneq \{0\}$?
Oh, I see from your other post that you're using a definition that precludes the zero ideal. Never mind.
13h
comment Question about working in modulo?
@user121615 do you understand that the order of an element in a finite group divides the size of the group?
20h
comment Question about working in modulo?
@user121515 the order of an element of a group divides the size of the group, that's why.
20h
answered Hints on how to approach a problem concerning rings/field in Abstract Algebra
21h
answered Question about working in modulo?
21h
comment help for my test
You may not have intended this, but you have successfully written your question in a way such that nobody is likely to take it seriously. I would advise picking a real title and not insisting on geometric answers to elementary probability questions.
1d
comment To show that $I$ is an ideal of $\Bbb Z[\sqrt 2]$ and $I$ is a maximal ideal of $\Bbb Z[\sqrt 2]$.
@tone Glancing at your question history, I notice you've had 12 duplicate questions already this year, 5 of them since the end of March. I'm pretty sure this is the second or third time I've given you specifically the following advice. Please use the search feature and/or try googling your question before you ask it. If your rate of duplication does not decrease over time, you might start getting complaints about it.
1d
revised Definition of angle between non-differentiable curves
spelling, tag
1d
awarded  Revival
1d
comment In a ring $(A,+, \cdot)$ if $aba = a$ then $bab = b$ and all element non zero in $A$ is invertible.
Why did you accept an answer that doesn't even address the hard half of the question?
1d
revised In a ring $(A,+, \cdot)$ if $aba = a$ then $bab = b$ and all element non zero in $A$ is invertible.
added 82 characters in body
1d
answered In a ring $(A,+, \cdot)$ if $aba = a$ then $bab = b$ and all element non zero in $A$ is invertible.
2d
revised Is there any geometrical interpretation as to why matrix product is not commutative?
added 262 characters in body
2d
answered Is there any geometrical interpretation as to why matrix product is not commutative?
2d
comment Does $\text{End}_K(K^n) \cong \text{Mat}(n\times n, K)$?
@PavelČoupek Please put solutions in the solutions section. Consider transferring it out of the comments. Thanks!
May
2
comment Infinite Matrices
@CalebParks Alternatively you can use the definition of multiplication directly, as Matt describes.
May
2
comment Infinite Matrices
@CalebParks You can view the product $AB$ as the columns of $B$ combining columns of $A$. A finite linear combination of columns with finitely many nonzero entries produces another column vector with finitely many nonzero entries.
May
1
revised Infinite Matrices
added 101 characters in body
May
1
answered Infinite Matrices