Combining Texts

You have chosen 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz, 'On Nature Itself (De Ipsa Natura)' by Gottfried Leibniz and 'Introducing the Philosophy of Mathematics' by Michle Friend

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All the ideas for Action, or select a subheading:
      A. Definition of Action
      B. Preliminaries of Action
      C. Motives for Action