Steven G. Johnson

Steven Glenn Johnson
Born	St. Charles, Illinois
Nationality	American
Alma mater	MIT
Known for	FFTW
Scientific career
Fields	Computer science, Mathematics
Institutions	MIT
Thesis	(2001)
Doctoral advisor	John Joannopoulos
Website	http://math.mit.edu/~stevenj/

Steven G. Johnson is an American mathematician known for being a co-creator of the FFTW library for software-based fast Fourier transforms and for his work on photonic crystals. He is professor of Applied Mathematics and Physics at MIT where he leads a group on Nanostructures and Computation.

While working on his PhD at MIT, he developed the Fastest Fourier Transform in the West (FFTW) library with Matteo Frigo; they were awarded the 1999 J. H. Wilkinson Prize for Numerical Software for this work.

He is the author of the NLOpt library for nonlinear optimization. He is a frequent contributor to the Julia programming language, and has also contributed to Python, R, and Matlab.

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