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12 Answers

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4	Mathematical formula for biological phenomena?
4	Cardinality: does $\|A^B\|=\|2^B\|$ if $\|A\| \le \|2^B\|$?
2	Can the principle of explosion be removed from constructive logic?
2	transfinite induction confusion
2	What is a constructive proof of $\lnot\lnot(P\vee\lnot P)$?

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364 Reputation

+10	Mathematical formula for biological phenomena?
+10	transfinite induction confusion
+5	If $T$ proves $\operatorname{Con}(ZFC)$, is $T$ at least as strong as set theory?
+10	Difference between axiomatization and model

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3 Questions

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6	If $T$ proves $\operatorname{Con}(ZFC)$, is $T$ at least as strong as set theory?
4	An “internal” condition on $T$ so that for the standard provability predicate, $T$ proves $\text{Pf}(\underline S)$ implies $T$ proves $S$?
2	Can we prove that some non-cardinal ordinals are regular?

20 Tags

9 elementary-set-theory × 7	4 biology
4 logic × 5	2 contradiction
4 constructive-mathematics × 2	2 model-theory
4 cardinals × 2	2 propositional-calculus
4 applications	2 reference-request

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$Mathematics Stack Exchange$	Mathematics	364 rep	111
	Philosophy	111 rep	3

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