On: Ask HN: How to learn math from zero for adults?

[TheOtherHobbes]

Yes - imagine inventing Fast Fourier Transforms without a computer.

Or the original continuous Fourier Transform, with just a pen and paper.

Or Heaviside's simplification of the Maxwell equations. Or calculating planetary orbits with perturbations.

Incredible leaps of imagination.

[jp0d → TheOtherHobbes]

True indeed. I was patting myself on the back for graduating engineering school without any help from WikiPedia or YouTube. But these legends wrote all those universe describing equations without the help of a computer.