3

In a German book by Helmut Kracke I found Frank Irvin mentioned. Irvin proved in 1916 the convergence of the harmonic series when all terms containing a 9 were omitted. I would like to include Irvin in my lecture but could not find anything about him except a mentioning of his name in AMM 1915 concerning the solution of a problem.

I would need the dates of birth and dead and possibly a picture.

Note. From the material contained in the answer supplied by Michael E2 I have seen that the original work is due to Kempner (1914) and already described in Wikipedia.

Franz Kurz
  • 1
  • 1
  • 5
  • 23
  • I checked Zentralblatt Math: no publication under the name Frank Irvin is listed. Zentralblatt is the database which is supposed to cover all publications in mathematics since 1880s. – Alexandre Eremenko Dec 05 '17 at 13:49