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 Yearling
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Mar
27
accepted An elementary proof about filters
Mar
26
comment An elementary proof about filters
@AndreasBlass: You are right, the first $\bigcap$ on the right side of the equation was intended to be $\bigcup$. I've corrected the question.
Mar
26
revised An elementary proof about filters
error in formula
Mar
25
asked An elementary proof about filters
Mar
22
answered Strengthening of a theorem about filters vs a counter-example
Mar
22
asked Strengthening of a theorem about filters vs a counter-example
Mar
20
accepted A question on order theory (an ordered set and its subset)
Mar
20
asked A question on order theory (an ordered set and its subset)
Dec
20
revised character theory question
added a tag
Dec
20
suggested approved edit on character theory question
Dec
17
awarded  Yearling
Dec
16
revised Generalized semilattice morphism
under the supposition that $\alpha$ is a monotone function
Dec
15
awarded  Caucus
Dec
15
revised Generalized semilattice morphism
deleted 2 characters in body
Dec
15
revised Generalized semilattice morphism
added 1 character in body
Dec
15
asked Generalized semilattice morphism
Dec
14
comment About a function ranging filters
Oh, I found an easy solution (but only for people who has read my book): $\operatorname{Back}(f;k)$ is a complete funcoid; from this the conjecture follows.
Dec
14
asked About a function ranging filters
Dec
8
asked Complete lattice without greatest element
Dec
6
asked Category defined by a finite commutative diagram