Combining Texts

You have chosen 'Frege's Concept of Numbers as Objects' by Crispin Wright, 'Reference and Generality (3rd ed)' by Peter Geach and 'Letter to G.H. Schaller' by Baruch de Spinoza

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All the ideas for Mathematics, or select a subheading:
      A. Nature of Mathematics
      B. Foundations for Mathematics
      C. Sources of Mathematics