[defrost]

quaternions - 1843, Hamilton

projective geometry - 1420's but big in the 19th Century.

These are things I used heavily programming earth mapping systems in the mid 1980s to mid 1990s. Principal reference text was from the 1920s.

[almostgotcaught]

... The guy I responded to is saying Pythagoras is good enough. Do you know what year Pythagoras died?

[defrost]

Does that invalidate his theorem (that he cribbed from the Babylonians)?

[IAmGraydon]

No one said it invalidated his theorem. They said it has been expanded upon.

Also, comparing web technologies to something as fundamental as the pythagorean theorem is reductionist and overall pretty ridiculous. Web technologies need maintenance. Proven mathematical formulas don’t.

[defrost]

They actually asked if I was aware what year he died.

The eponymous triangle work is just as valid as it ever was in Euclidean geometries - lot of work there. That work is just as wrong as it ever was in non-Euclidean geometries - maths is timeless like that.

> Also, comparing web technologies to something as fundamental as ...

Take that up with whomever it was that did that.

[malfmalf]

495 BC. And his Theorem is still good enough for most practical purposes, so his point stands