idea number gives full details.     |    back to list of philosophers     |     expand these ideas

Ideas of Augustus De Morgan, by Text

[British, 1806 - 1871, Professor at King's College, London.]

1846 works
p.20 De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things'
1859 On the Syllogism IV
p.21 De Morgan started the study of relations and their properties
p.94 De Morgan found inferences involving relations, which eluded Aristotle's syllogistic