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seen Oct 6 '13 at 19:34

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awarded  Curious
Jun
15
awarded  Popular Question
Mar
4
comment Inverse Jacobian matrix of spherical coordinates
@copper.hat Right... I will try to do it explicitly!
Mar
4
asked Inverse Jacobian matrix of spherical coordinates
Mar
3
accepted Proof inequality
Mar
3
comment Proof inequality
PERFECT! Thank you very much!
Mar
3
comment Proof inequality
Thank you! But I don't see easily where your inequality comes from... Can you be more specific please? (Ps: as we have k-1, it's ok to start from k=0?)
Mar
3
awarded  Editor
Mar
3
comment Proof inequality
@DominicMichaelis Of course I messed up, sorry again.
Mar
3
revised Proof inequality
edited body
Mar
3
comment Proof inequality
@DominicMichaelis Sorry... (w_n) is a nonnegative sequence...
Mar
3
asked Proof inequality
Nov
1
asked R subset and Borel set
Oct
2
accepted What is a countable set?
Oct
1
awarded  Scholar
Oct
1
accepted $\sigma$-additivity
Oct
1
asked What is a countable set?
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30
awarded  Supporter
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30
awarded  Student
Sep
30
asked $\sigma$-additivity