From experience I know that if I save .jpg file with an .png extension (or vice versa) the most programs will open it as normally. I am wondering why is that the case and ask people with experience in the video codecs, what will happen if I try to save mov or avi files as mp4? (To be totally clea...

I think I have a pretty good intuitive understanding of most types of fibrations of quasicategories: a (trivial) Kan fibration is a bundle of (contractible) spaces with equivalent fibers, a left/right fibration is a bundle of spaces with covariant/contravariant functors between fibers, a (co)Car...

What are some examples of conjectures proved to be true generically (i.e. there is a dense $G_{\delta}$ of objects that affirm the conjecture) but are nevertheless false? Also, it would be cool to see examples where the conjecture was proved true with probability 1, but was nevertheless false. Of...

What is the 15-pin black port that old sound cards have? Here is an example