5 ms·

I asked the same question in this thread and got a couple of detailed answers: https://news.ycombinator.com/item?id=34652909 https://news.ycombinator.com/item?

by schoen 4y ago

I asked the same question in this thread and got a couple of detailed answers: https://news.ycombinator.com/item?id=34652909 https://news.ycombinator.com/item?id=34652909

archi42 4y ago
Ah, yes, f(x) = x² mod 5 is a nice counter example. f(2) = f(3). Thanks for the pointer!