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May
11
awarded  Commentator
May
11
comment What automorphisms exist on the abelian group of positive rationals under multiplication?
Is there a reasonable way to find all of them?
May
11
comment What automorphisms exist on the abelian group of positive rationals under multiplication?
Can it easily be shown that these are the only ones?
May
11
asked What automorphisms exist on the abelian group of positive rationals under multiplication?
Apr
30
revised Looking for combinatorial identity: $\sum\limits_{j=0}^k{n \choose k-j}{m \choose j}$
typo in the name of the identity
Apr
30
suggested approved edit on Looking for combinatorial identity: $\sum\limits_{j=0}^k{n \choose k-j}{m \choose j}$
Feb
18
awarded  Teacher
Feb
18
answered Is there a common symbol for concatenating two (finite) sequences?
Jan
22
awarded  Popular Question
Jan
6
accepted Is a prime to the power of a fraction always irrational?
Jan
6
asked Is a prime to the power of a fraction always irrational?
Dec
20
awarded  Constituent
Dec
10
awarded  Excavator
Dec
9
suggested rejected edit on Notation for sequences
Dec
8
awarded  Caucus
Dec
8
accepted Does there exist a surjective homomorphism between every pair of monoids?
Dec
8
revised Does there exist a surjective homomorphism between every pair of monoids?
Add surjectivity requirement
Dec
8
comment Does there exist a surjective homomorphism between every pair of monoids?
I forgot to mention I need the homomorphism to be surjective. Updating question.
Dec
8
asked Does there exist a surjective homomorphism between every pair of monoids?
Jul
2
awarded  Curious