Combining Texts

You have chosen 'Natural Science (lost)' by Metrodorus (Chi), 'Preface to Universal Characteristic' by Gottfried Leibniz and 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo

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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