Mathematician:Robert W Floyd

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American computer scientist, who was active in discrete mathematics.

Noted for his work on parsing.

Introduced the concept of error diffusion for rendering images.

Pioneered the field of program verification using logical assertions. This contributed to what later became Hoare logic.




  • Born: June 8, 1936 in New York City
  • Died: September 25, 2001 in Stanford

Theorems and Definitions


  • 1967: Assigning meanings to programs (Proc. Symp. Appl. Math. Vol. 19: pp. 19 – 32)
  • 1979: The Paradigms of Programming
  • 1994: The Language of Machines: an Introduction to Computability and Formal Languages (with Richard Beigel)

Also known as

Robert W Floyd legally changed his middle name to W from Willoughby, but preferred to continue to abbreviate it as W., including the period.