what app is he using it seems helpful I want to get it
Nice video! I am a pretty mathematically rigorous person and it always annoys me when people (especially teachers) multiply by dx or dt without understanding what that step really means, I feel very reassured knowing that someone else is rigorous about this too and knows the difference
Where can I get some rigor?
take a shot every time he says "rigor"
does dy/dx = z mean that dx/dy = 1/z?
This makes sense