You have chosen 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz, 'The Big Book of Concepts' by Gregory L. Murphy and 'Value Theory' by Francesco Orsi
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Existence, or select a subheading: |
| A. | Nature of Existence | |
| B. | Change in Existence | |
| C. | Structure of Existence | |
| D. | Theories of Reality | |
| E. | Categories |