yo'
Reputation
1,754
Next privilege 2,000 Rep.
 Mar28 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. Mar16 revised Does this qualify as a Laurent series? improved formatting Mar16 suggested approved edit on Does this qualify as a Laurent series? Mar16 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. Mar16 revised Confusion with a function being “onto” and 1-1 correspondence. added 259 characters in body Mar16 comment Idempotents and symmetries of Zn Have you ever heard about quadratic residues? Mar16 answered Confusion with a function being “onto” and 1-1 correspondence. Mar16 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" ;) Mar16 revised Find $n$ numbers which LCM is equal to $k$ added 306 characters in body Mar16 answered Find $n$ numbers which LCM is equal to $k$ Mar16 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. Mar16 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 Mar16 comment $CD+C+D=0$, show that $CD=DC$ ah damn, stupid me. Mar16 comment $CD+C+D=0$, show that $CD=DC$ Are you guaranteed that any matrix here but $I$ has an inverse? Mar16 asked Denoting bijection (conjugation) in a commutative diagram Mar12 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. Mar11 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.) Mar11 comment Is there a word similar to “iff” meaning “one and only one”? Oh no! Symbols everywhere :-( Mar11 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. Mar11 comment Prove that the complex expression is real @CiaPan "You don't need an induction in this case" sounds to me like "the story is not complete". I don't buy this.