14 Answers votes newest views recent 12Sexy vacuity … 3Minimal basis of set of positive integers 2“negative” vs “minus” 3Ways to Synthesize Topics in Linear Algebra 2How to sufficiently motivate organization of proofs in math books 2Is there a theorem that says that there is always more than one way to “continue a finite sequence”? 0Does every finitely generated group have a maximal normal subgroup? 5Most helpful heuristic? 3Has anyone studied the applications which map open sets to either open or closed sets? 3Conjugacy classes in finite groups that remain conjugacy classes when restricted to proper subgroups 9Most harmful heuristic? 2Number of metric spaces on N points 3Why is the gradient normal? 12Do good math jokes exist?