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Associated with Math.SE; for both general discussion & math questions alike. Just ask; don't ask to ask. Rarely if ever expressible as a ratio of integers. See below for guidelines.

Our menace: the Unanswered queue. Our goal: total annihilation! (NB. This room is not for asking maths questions.)

When should a tag be added

Come to have fun

How do things work for a maths student at Cambridge?

for executioners, paramedics, etc.

Imported from a comment discussion on http://math.stackexchange.com/questions/493987/multiplying-both-sides-of-matrix-equation-by-inverse

Imported from a comment discussion on http://math.stackexchange.com/questions/493579/minimum-numbers-of-cards/493584#493584

Imported from a comment discussion on http://math.stackexchange.com/questions/493102/nested-quantifiers-true-or-false/493105#493105

Imported from a comment discussion on http://math.stackexchange.com/questions/492704/coset-and-subgroup

Imported from a comment discussion on http://math.stackexchange.com/questions/492643/how-to-evaluate-the-limit-lim-limits-x-to-1-left-frac21-x2-frac3/492646#492646

Imported from a comment discussion on http://math.stackexchange.com/questions/490744/what-should-be-added-to-x4-2x3-2x2-x-1-to-make-it-exactly-divisible/491259#491259

Imported from a comment discussion on http://math.stackexchange.com/questions/492171/algebra-i-any-ordered-ring-must-contain-at-least-5-elements/492174#492174

Imported from a comment discussion on http://math.stackexchange.com/questions/491119/prove-a-map-is-linear-or-not/491127#491127

Imported from a comment discussion on http://math.stackexchange.com/questions/491032/prove-that-all-the-roots-of-sin-z-a-where-1-leq-a-leq-1-are-real/491035#491035

Imported from a comment discussion on http://math.stackexchange.com/questions/490383/what-does-it-mean-to-be-compatible-with-the-isomorphism-structure-of-a-class/490424#490424

Imported from a comment discussion on http://math.stackexchange.com/questions/490355/prove-left-langle-n-1-n-2-n-k-right-rangle-left-langle-n-1/490362#490362

Imported from a comment discussion on http://math.stackexchange.com/questions/490294/how-would-i-prove-what-elements-s-3-contains-and-what-its-subgroups-are

Imported from a comment discussion on http://math.stackexchange.com/questions/489400/how-to-prove-that-if-a-group-has-no-proper-subgroup-it-is-finite/489407#489407

Imported from a comment discussion on http://math.stackexchange.com/questions/489035/can-we-prove-that-odd-and-even-numbers-alternate-without-using-induction/489079#489079

Imported from a comment discussion on http://math.stackexchange.com/questions/488111/measures-on-a-borel-sigma-algebra