Jan
6
awarded Yearling
Dec
8
accepted Explicit formula for a right splitting once we have a left splitting
Dec
8
asked Explicit formula for a right splitting once we have a left splitting
Aug
29
accepted How can I prove that the complement of the set of linear combinations of numbers with gcd 1 is finite?
Aug
29
comment How can I prove that the complement of the set of linear combinations of numbers with gcd 1 is finite?
I meant gcd$\{g_1,\ldots,g_n\}=1$
Aug
28
asked How can I prove that the complement of the set of linear combinations of numbers with gcd 1 is finite?
Jul
6
revised Inequality of the coefficients of a generating function knowing an inequality on the generating function
edited body
Jul
6
asked Inequality of the coefficients of a generating function knowing an inequality on the generating function
May
13
comment Artinian rings are perfect
I would take as definition: every flat module is projective
May
13
asked Artinian rings are perfect
May
13
comment Why over $\mathbb{Z}/n\mathbb{Z}$ projectivity, injectivity and flatness coincide for cyclic modules?
I see that if $m|n$ and $(m,n/m)=1$ then $\mathbb{Z}/m\mathbb{Z}$ is projective, I don't see the other implication Also I don't see how to prove by hand that those are injective and flat, any help?
May
12
asked Why over $\mathbb{Z}/n\mathbb{Z}$ projectivity, injectivity and flatness coincide for cyclic modules?
Jun
8
awarded Caucus
May
12
accepted Why is this ideal projective but not free?
May
12
asked Why is this ideal projective but not free?
May
9
awarded Supporter
May
9
accepted Why is this subgroup normal?
May
9
asked Why is this subgroup normal?
May
7
accepted Infinitely many nilpotent elements in $\mathbb{C}[G]$
May
6
asked Infinitely many nilpotent elements in $\mathbb{C}[G]$
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