1877
ID: 378
Ernst Schröder begins publishing 'Der Operationskreis des Logikkalküls', systematizing Boolean algebra
ID: 378
1877
ID: 1006
Cantor proves real numbers are uncountably infinite - multiple sizes of infinity exist
ID: 1006
1877
ID: 1007
Georg Frobenius develops systematic group representation theory - essential for quantum mechanics
ID: 1007
1877
ID: 1008
Milk inspection begins in Chicago
ID: 1008