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1d
comment Curious identity involving symmetric difference
Yes, this is what I meant by proving it by a case reduction. What I'm wondering is if you can prove it using just set algebra. It if alternatively, the algebra is incomplete.
1d
asked Curious identity involving symmetric difference
Aug
21
comment Injection vs. Surjection: Mnemonic to remember which is which
This also makes sense in that if $f:A\rightarrow B$ is injective, then $A\le B$ and if it is surjective then $A\ge B$.
Aug
20
comment Counterexample for downward monotone convergence theorem on measurable set
This idea of splitting E into a countable union AND a limit set is something I'll have to ponder over for a while :-)
Aug
13
comment Example to show the distance between two closed sets can be 0 even if the two sets are disjoint
And you prove that it is closed because it's the complement of an infinite amount of open intervals?
Aug
11
comment Examples of non-Riemann integrable functions that appear “in nature”?
Should that have been $x^{-2} $?
Jul
19
comment Example of operation that is tree associative, but not generally associative
Well, I suppose we could always just take a set of size 0 or 1. I was hoping for something infinite and which is actually used for something.
Jul
19
asked Example of operation that is tree associative, but not generally associative
Jul
15
comment Entropy of a binomial distribution
How is the integration done in the second to last step?
Jul
6
comment Adding a different constant to numerator and denominator
@robjohn: Do you know if this operation has a name? Other than 'add the numerators and denominators of the fractions'.
Jul
6
answered Adding a different constant to numerator and denominator
Jul
2
awarded  Curious
Jun
17
comment A tight lower bound for the entropy of the XOR of two random variables
A non tight lower bound is the maximum of the entropy of the two variables.
Jun
11
revised Lower bound for $(x^c-1)^{1/c}$
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Jun
11
revised Lower bound for $(x^c-1)^{1/c}$
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Jun
11
revised Lower bound for $(x^c-1)^{1/c}$
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11
revised Lower bound for $(x^c-1)^{1/c}$
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Jun
11
comment Lower bound for $(x^c-1)^{1/c}$
Thank you, that's a good suggestion.
Jun
11
revised Lower bound for $(x^c-1)^{1/c}$
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Jun
11
revised Lower bound for $(x^c-1)^{1/c}$
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