How did the refereeing system of Gösta Mittag-Leffler's Acta Mathematica function from 1882 to (about) 1918?
Has anything (other than what is in the obituary written by M. Noether) survived of Paul Gordan's defense of infinitesimals?
Does there exist a graph with maximum degree 8, chromatic number 8, clique number 6?
Where did Zermelo first model the natural numbers by iterates of the singleton operator, and have the definitions been compared by himself?
Detailed modern references for basic properties of Pfaffians over commutative rings
Why does a perfectly-identical repetition of a drawing command given within an earlier loop 𝘯𝘰𝘵 produce exactly the same line?
Is there a convex three-dimensional body with constant width and only finitely-many equilibria? Or: do spheroform gömböcök exist?
F. Schoblik's announced ''ausführliche Darstellung": a lost wrong proof of the Four Color Theorem?