You have chosen 'Isagoge ('Introduction')' by Porphyry, 'The Spirit of the Laws (rev. 1757)' by Baron de Montesquieu and 'The Sign of Four' by Arthur Conan Doyle
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 |