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Apr
15
comment Possible arrangments Letters?
Welcome to math.SE. Please share your thoughts on the problem so far. Knowing what you know will help us provide the most useful hints and solutions!
Apr
15
answered In S_3, an even permutation must have an odd number of orbits. True or False?
Apr
15
comment In S_3, an even permutation must have an odd number of orbits. True or False?
Also, most beginning texts use left actions instead of right actions, in which case you have multiplied in the wrong order. I would write $(123)=(13)(12)$, and $(12)(12)=(132)$ because I apply the rightmost permutation first. You may wish to double-check this.
Apr
15
comment In S_3, an even permutation must have an odd number of orbits. True or False?
You're right about $(123)$. The orbit of an element is the orbit of the subgroup generated by that element. Does that make sense?
Apr
15
reviewed Reviewed High school calculus variables problem
Apr
15
comment High school calculus variables problem
Welcome to math.SE. Are there any ideas or definitions that you might be able to use on this problem? The more you can share about your thoughts so far, the more helpful we will be able to be. Also, if this is homework, please use the appropriate tag. Don't worry, people will still be happy to help out!
Apr
15
reviewed No Action Needed Probability of 2 independent events and 1 mutually exclusive
Apr
15
reviewed Approve Probability of 2 independent events and 1 mutually exclusive
Apr
14
reviewed Edit Root of unity paradox
Apr
14
revised Root of unity paradox
Latex Editing
Apr
14
reviewed Reviewed suming an infinite series
Apr
14
comment suming an infinite series
Your sums are set up correctly. Hint: These are geometric series.
Apr
14
reviewed Edit Cardinality, Finite Sets Proof
Apr
14
revised Cardinality, Finite Sets Proof
adjusted tags
Apr
14
revised $R[[x]]$ for a Noetherian ring $R$?
edited body
Apr
14
comment $R[[x]]$ for a Noetherian ring $R$?
@massy255 Thanks. Just fixed it!
Jan
5
awarded  Yearling
Dec
19
awarded  Nice Answer
Dec
9
revised A couple questions on radical extensions
added 137 characters in body
Dec
9
comment A couple questions on radical extensions
@user39947 Thanks for pointing out the mistake. I'll amend the post now.