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Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen
  • Member for 14 years, 9 months
  • Last seen this week
asked
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Weighted Hamming distance
rewrite to make more readable
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awarded
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Measure of the support of a Borel probability on a metric space
Combine this with Autoleech's proof that there is no counterexample for locally compact spaces, and we will have a proof that there are no measurable cardinals - finally!
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Count of lattices on finite set
added 14 characters in body
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An ultrafilter and a partition
deleted 209 characters in body
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Can invariant of transitive reflexive closure in FOL+PA always been proven?
To maybe clarify Andrej Bauer's comment, the 2nd part of the displayed formula is equivalent to the form $\forall x,y,n (\phi\wedge R^n\rightarrow\ldots)$.
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Can invariant of transitive reflexive closure in FOL+PA always been proven?
To clarify, is the displayed formula missing some quantifiers? Also, by FOL+PA do you just mean the usual Peano Arithmetic?
revised
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revised
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"Industry"/Government jobs for mathematicians
I think the analogy with teaching works best if you mean those colleges that value teaching higher than research.
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Is there a measure zero set which isn't meagre?
@Gerald Edgar: good question, maybe argue that we can make a real number belong to each $V_n$ by specifying more and more of its binary expansion. We can even take breaks, i.e., after we have made $r$ start as $0.r_0\cdots r_{k_1}$ and thereby ensured $r\in V_1$ we can append $r_{k_1+1}\cdots r_{\ell}$ so as to make sure $r\ne p_1$. Then we add $r_{\ell+1}\cdots r_{k_2}$ to make $r\in V_2$ and so on. This kind of thing also shows $\cap_n V_n$ is size continuum.
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