In calculus you're supposed to learn that y/0 with y != 0 is "undefined" (±Inf with limit expressions), while 0/0 is "indeterminate" (can construct any value us

In calculus you're supposed to learn that y/0 with y != 0 is "undefined" (±Inf with limit expressions), while 0/0 is "indeterminate" (can construct any value using a limit expression that contains x/x with x -> 0).