Robert Berger (mathematician)

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Robert Berger is the name of at least two notable mathematicians.

[edit] Robert Berger (U.S.)

Robert Berger invented the first aperiodic tiling using a set of 20,426 distinct tile shapes. This work was for a doctoral thesis at Harvard University, and disproved a conjecture of Hao Wang (Undecidability of the domino problem, Memoirs of the AMS 1966).

[edit] Robert W. Berger (Germany)

Robert W. Berger was born July 8, 1933. He received his Ph.D. in 1958 at the Ruprecht-Karls-Universität Heidelberg; it was titled,"Derivationen mehrstufiger diskreter Bewertungsringe von Primzahlcharakteristik."[1] He published a number of geometry textbooks. Among them was "Differentialrechnung in der analytischen Geometrie" published in 1967 as part of the Springer-Verlag Lecture notes in mathematics series.