Theodor Spieker Explained

Theodor Spieker (8 August 1823 – 9 April 1913) was a German mathematician, a teacher at a gymnasium in Potsdam.[1]

Spieker's geometry textbook German: Lehrbuch der ebenen Geometrie mit Übungs-Aufgaben für höhere Lehranstalten (Verlag von August Stein, Potsdam, 1862)[2] [3] was republished in many editions. A copy of this textbook was given to Albert Einstein by his tutor when Einstein was twelve, and quickly led Einstein to become interested in higher mathematics.[4]

Spieker is the namesake of the Spieker circle of a triangle (the circle inscribed in its medial triangle) and the Spieker center (the center of the Spieker circle).

Notes and References

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  2. https://www.worldcat.org/oclc/162236270 Worldcat entry
  3. https://books.google.com/books?id=kHALAAAAYAAJ Lehrbuch der ebenen Geometrie mit Übungs-Aufgaben für höhere Lehranstalten
  4. .