Bannalia: trivial notes on themes diverse

We give here the proof of the theorem and corollary stated in "A non-Euclidean characterization of convexity" . Theorem. For any ...

We Spaniards have a curiously stubborn inability to correctly pronounce foreign words beginning with /s/+consonant, such as, for instance, ...

A strict weak ordering (swo for short) is a binary relation < on a set A such that its complementary relation ≥ = A x A − < is a to...

Harry G. Frankfurt's much talked about On Truth purports that truth, i.e. the knowledge of true statements, is crucial to the developme...

A set X in a real vector space is convex if for every x , y in X the segment x y = { λx + (1− λ ) y : 0 ≤ λ ≤ 1} is included in X . T...

A cartel is an explicit and secretive agreement between rival companies in an oligopolistic market to take joint action so as to reduce effe...

This entry justifies some of the assumptions behind the algorithm devised at the prior entry "Within 50 km, revisited" . Let C be...