NaN means only NaN, 0/0 is NaN at the cpu level. to my weak undestanding only pow and hypot behave like this; pow for math reasons and i could guess that hypot

NaN means only NaN, 0/0 is NaN at the cpu level. to my weak undestanding only pow and hypot behave like this; pow for math reasons and i could guess that hypot does that to sorta have |x| <= hypot(x,y)