Combining Texts

You have chosen 'works (all lost)' by Aristippus the elder, 'Oldest System Prog. of German Idealism' by Georg W.F.Hegel and 'The Conquest of Happiness' 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