Viewing profile — liuyao

I thought something as simple as this would have been tried out long ago. Here are some related ideas. Instead of pruning channels, one should try to prune connections. Say with a …

Come on, if I defined f(x)=x^2, and later used f(y) for y=x/2 or something, do you have problem with that?

You can weaken "completeness" though. In each of its many manifestations, completeness asks for the existence of something for all subsets (sequences, functions, ...) of reals. We …

Great example. Weil is said to be the one who was deeply immersed in both the geometric tradition of the Italians and the functional perspective of Riemann, so he was in a unique p…

These kind of heuristics are supposedly a prerequisite to the formal study, but sadly most textbooks don't spend the time talking about it (since logically it's not necessary). Ins…