1761
ID: 439
Euler introduces Euler diagrams for visualizing syllogistic reasoning, improving on medieval methods
ID: 439
1761
ID: 559
Johann Lambert proves π is irrational - first rigorous proof π cannot be expressed as ratio of integers
ID: 559
1761
ID: 560
Euler develops theory of partitions in number theory using generating functions
ID: 560
1761
ID: 561
Rousseau's 'Julie, or the New Heloise' creates cult of sentiment prefiguring Romanticism
ID: 561