You have chosen 'Db (lexicon)' by PG, 'Grundgesetze der Arithmetik 2 (Basic Laws)' by Gottlob Frege and 'The Problem of Counterfactual Conditionals' by Nelson Goodman
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Mathematics, or select a subheading: |
| A. | Nature of Mathematics | |
| B. | Foundations for Mathematics | |
| C. | Sources of Mathematics |