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May
1
comment Assigning values to divergent series
I wonder why the downvote.
Mar
28
comment Average Frequency of 1's in an Infinite Binary Sequences Can be Anything Between 0 and 1
I was just about to post the same thing. No need for complicated formulas.
Mar
16
revised Does this qualify as a Laurent series?
improved formatting
Mar
16
suggested approved edit on Does this qualify as a Laurent series?
Mar
16
comment Denoting bijection (conjugation) in a commutative diagram
@IbrahimTencer Well, in the right one, the direction is clear; the inverse would be put on left from the double arrow.
Mar
16
revised Confusion with a function being “onto” and 1-1 correspondence.
added 259 characters in body
Mar
16
comment Idempotents and symmetries of Zn
Have you ever heard about quadratic residues?
Mar
16
answered Confusion with a function being “onto” and 1-1 correspondence.
Mar
16
comment Confusion with a function being “onto” and 1-1 correspondence.
Yes, it means that $f$ is a bijection, and this is one of the definitions of "equal in size" ;)
Mar
16
revised Find $n$ numbers which LCM is equal to $k$
added 306 characters in body
Mar
16
answered Find $n$ numbers which LCM is equal to $k$
Mar
16
revised Show that $(x\in\mathopen]0,1\mathclose[\mapsto \frac{1}{1-ax})_{a\in\mathopen]0,1\mathclose[}$ is free
improved formatting: I made open intervals look like open intervals.
Mar
16
suggested approved edit on Show that $(x\in\mathopen]0,1\mathclose[\mapsto \frac{1}{1-ax})_{a\in\mathopen]0,1\mathclose[}$ is free
Mar
16
comment $CD+C+D=0$, show that $CD=DC$
ah damn, stupid me.
Mar
16
comment $CD+C+D=0$, show that $CD=DC$
Are you guaranteed that any matrix here but $I$ has an inverse?
Mar
16
asked Denoting bijection (conjugation) in a commutative diagram
Mar
12
comment Is there a word similar to “iff” meaning “one and only one”?
@MarioCarneiro The question doesn't need more than 2 answers. But that may be only my point of view.
Mar
11
comment Is there a word similar to “iff” meaning “one and only one”?
I hope I'll never meet a person willing to write "exists a unique" as $(P\oplus Q\oplus R)\land\lnot(P\land Q\land R)$. (I don't speak about computer algebra, but neither the OP is.)
Mar
11
comment Is there a word similar to “iff” meaning “one and only one”?
Oh no! Symbols everywhere :-(
Mar
11
comment Is there a word similar to “iff” meaning “one and only one”?
@SteveJessop No, it is not equally sensiitive. It's much easier to overlook a typo in a word than in a number.