Popopo

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609 reputation

226

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	location	Pop Star, MathCraft
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visits	member for	11 months
	seen	20 hours ago
stats	profile views	218

A student in Philosophy but also curious in many fields.

I don't know,

But I want to know.

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58 Questions

votes activity newest

11	Hyperreal measure?
8	Can we conclude $\prod_{\kappa \in Crd, \kappa=1}^{\kappa<\aleph_\alpha}\kappa=2^{\aleph_\alpha}$ in ZFC?
7	What is straight line?
7	Fractional calculus in complex analysis
6	Are there rules in the useage of prepositions in Math?

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609 Reputation

+5	Prove/Disprove $f$ continuous iff $f[\mathring{A}]\supseteq\mathring{f[A]}$
+5	Cardinality of the set of ultrafilters on an infinite Boolean algebra
+10	Which logic is stronger? SOL or $\frak{L}_{\infty,\infty}$?
+5	Is $\aleph_0$ the minimum infinite cardinal number in $ZF$?

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9 Answers

votes activity newest

2	How can $\mathbb{N}$ have an upper bound?
2	number of elements in a sigma algebra generated by a finite algebra
1	Entropy: Is $H(X_{1},X_{2}) = H(X_{1})$ true?
1	Proving a function is constant when $f(x)f(y) + f(\frac{a}{x})f(\frac{a}{y}) = 2f(xy)$
1	If $f \circ g$ is invertible, is $(f \circ g)^{-1} = g^{-1} \circ f^{-1}$?

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56 Tags

2 set-theory × 11	1 lattice-orders × 3
2 real-analysis	1 limit × 3
1 elementary-set-theory × 16	1 boolean-algebra × 3
1 homework × 4	1 information-theory × 2
1 order-theory × 4	1 functional-equations

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46 Accounts

$Mathematics Stack Exchange$	Mathematics	609 rep	226
	Meta Stack Overflow	379 rep	6
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	316 rep	10
	Area 51	248 rep	7
	Physics	243 rep	116

27 Badges

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Caucus	Autobiographer
Nice Question	Tag Editor
Informed	Enthusiast
Civic Duty	Custodian × 2
Disciplined	Cleanup

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571 Votes Cast

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0	down		319	answer		19

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