Friedrich Haag

Friedrich Haag (20 August 1856 – 8 December 1941) was a pioneering German crystallographer.[1][2]

An article written by Haag in the de:Zeitschrift für Kristallographie (a German crystallography journal) was used by M. C. Escher in his study of tessellation.[3][4]

References
  1. "H. Wondratschek Topics, The Rigaku Journal, Volume 4, Issue 1/2, 1987, p. 33" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2015-11-05.
  2. Doris Schattschneider Tiling the plane with congruent pentagons, Math. Mag., 1978, Volume 51, pp. 29–44
  3. Haag Die regelmäßigen Planteilungen und Punktsysteme, Zeitschrift für Kristallographie, Volume 58, 1923, pp. 478–489
  4. Doris Schattschneider The Mathematical Side of M. C. Escher, Notices AMS, June/July 2010, p. 707


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