373 reputation
617
bio website
location the virgo supercluster
age
visits member for 3 years, 7 months
seen Jul 27 at 19:50

Dec
23
asked Prove the determinants of these related matrices are zero.
Dec
16
awarded  Popular Question
Dec
15
comment Prove $2^{1/3}$ is irrational.
@missingno, I didn't. I assumed $2^{1/2}$ was irrational; my intention was to prove $2^{1/3}$ was irrational. Surely you can see the difference now.
Dec
15
awarded  Nice Question
Dec
14
accepted Prove $2^{1/3}$ is irrational.
Dec
14
comment Prove $2^{1/3}$ is irrational.
@JackManey, I like this proof because it reduces the possibilities to a small number (four) of cases that can be checked to see if they are zeros of the polynomial. I'll give this question some time, but this'll probably be the answer I accept.
Dec
14
comment Prove $2^{1/3}$ is irrational.
you're right, as I noted in the comments to the OP. I would argue on philosophical grounds that a proof by contradiction isn't as strong as another that is constructed, but that is not a mathematical objection, so I'll let it lie...
Dec
14
awarded  Commentator
Dec
14
comment Prove $2^{1/3}$ is irrational.
@DidierPiau, I suppose any given irrational number divided by itself is 1, which is rational. hmmph. I'll take another crack at it with gcd algorithm tonight.
Dec
14
asked Prove $2^{1/3}$ is irrational.
Nov
17
comment Can the symmetric group $S_n$ be imbedded as a subgroup in $A_{2n+1}$?
@ArturoMagidin, Fixed.
Nov
17
revised Can the symmetric group $S_n$ be imbedded as a subgroup in $A_{2n+1}$?
edited title
Nov
17
comment Can the symmetric group $S_n$ be imbedded as a subgroup in $A_{2n+1}$?
@ArturoMagidin, I am more interested in the $A_{2n+1}$ groups, with the first one e.g. $A_{n+1}$ being a special case. See the last paragraph. Anyway, I'm going off to recalculate the parity again and will be back if I have any more questions. thanks again!
Nov
17
revised Can the symmetric group $S_n$ be imbedded as a subgroup in $A_{2n+1}$?
edited title
Nov
17
asked Can the symmetric group $S_n$ be imbedded as a subgroup in $A_{2n+1}$?
Nov
2
comment Prove that symmetric groups are associative.
yes, you caught me second-guessing myself.
Nov
1
awarded  Student
Nov
1
asked Prove that symmetric groups are associative.
Sep
15
awarded  Scholar
Sep
15
accepted Prove that every element of a finite group has an order