Combining Texts

You have chosen 'The Philosophy of Leibniz' by Bertrand Russell, 'The Actual and the Virtual' by Gilles Deleuze and 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell

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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