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Jan
28
awarded  Popular Question
Jan
2
awarded  Yearling
Dec
9
awarded  Caucus
Oct
26
accepted Is it a wrong exercise in Pinter's Algebra?
Oct
26
comment Is it a wrong exercise in Pinter's Algebra?
No, this question is supposed to be proved.
Oct
26
revised Is it a wrong exercise in Pinter's Algebra?
added 28 characters in body
Oct
26
revised Is it a wrong exercise in Pinter's Algebra?
added 2 characters in body
Oct
26
asked Is it a wrong exercise in Pinter's Algebra?
Oct
17
comment Solving an exercise in Pinter's Abstract Algebra
I still don't see how to show that for any $x \in H$, there is $y \in H$ such that $aya^{-1} = x$ (given that $aka^{-1} \in H$ for any $k \in H$).
Oct
17
revised Solving an exercise in Pinter's Abstract Algebra
edited body
Oct
17
revised Solving an exercise in Pinter's Abstract Algebra
edited body
Oct
17
asked Solving an exercise in Pinter's Abstract Algebra
Oct
4
awarded  Popular Question
Sep
24
awarded  Autobiographer
Sep
2
awarded  Teacher
Aug
31
accepted Define finite ordered set using nested tuples
Aug
31
revised Define finite ordered set using nested tuples
added 150 characters in body
Aug
28
comment Define finite ordered set using nested tuples
@AsafKaragila: Baby Jech is "Introduction to Set Theory," when Papa Jech is "Set Theory." I have just coined this names :)
Aug
28
comment Define finite ordered set using nested tuples
@AsafKaragila: You sound like you know where it is from (it is from Baby Jech). Actually I have to solve this problem, the author provides a long hint for this exercise. I didn't read the hint when I asked this question, but then I read it because I was confused. Or you want to say that if there is a hint, you must read it. I choose to try to solve a problem before reading the hint.
Aug
28
revised Define finite ordered set using nested tuples
added 94 characters in body