display all the ideas for this combination of texts
4 ideas
8490 | First-level functions have objects as arguments; second-level functions take functions as arguments [Frege] |
17744 | De Morgan started the study of relations and their properties [De Morgan, by Walicki] |
13501 | De Morgan found inferences involving relations, which eluded Aristotle's syllogistic [De Morgan, by Hart,WD] |
8492 | Relations are functions with two arguments [Frege] |