Events Tagged: "parallel postulate"

2 events with tag "parallel postulate"

1733 ID: 499
Giovanni Saccheri explores non-Euclidean geometry while trying to prove Euclid - accidentally discovers hyperbolic geometry
ID: 499
1826 ID: 765
Nikolai Lobachevsky develops first non-Euclidean geometry - challenges 2000-year-old Euclidean assumptions
ID: 765