Mathematics Teacher (1923) Vol. 16, No. 1

  • Mathematics Teacher (1923) Vol. 16, No. 1

    THE MATHEMATICS TEACHER YoLnrE XYI JANUARY, 1923 NUMBER 1 'l'IJE EXTENSION OF CONCEPTS IN MATTIEMATICS 1 By AUBREY J. KEMPN~R University or Illinois Tlle subject which I wish to outline in the briefest manner is the old problem of introducing into Algebra and Geometry such concepts as, for example, irrational numbers,