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Questions
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16
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5
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863
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Where in ordinary math do we need unbounded separation and replacement?

mar 6 at 9:22 Adam Epstein 946●2●12

 
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1
answer
168
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What to call substructures in universal algebra in which we restrict the signature?

may 3 12 at 22:28 Joel David Hamkins 74.9k●7●187●343

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Why is the cardinality of the codomain of a ring epimorphism at most the cardinality of the domain?

nov 1 11 at 22:06 Boris Novikov 1,346●1●3●9

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Are limits and colimits in the category of etale maps computed fiber-wise?

dec 3 11 at 4:02 Benjamin Steinberg 10.6k●1●14●49

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How to calculate the Feigenbaum constant to high precision?

apr 30 11 at 15:34 Jeremy Kahn 306●1●5

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Is the decomposition of an algebra into irreducible components essentially unique?

dec 12 10 at 0:42 William DeMeo 576●3●10

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6
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Algorithms for finding rational points on an elliptic curve?

feb 9 at 7:28 Barış Can Tayiz 1●2

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3
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755
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Is there a “primitive-recursively enumerable” set whose complement is not such?

apr 12 10 at 12:59 Antonio E. Porreca 717●1●6●10