Steven Glenn Johnson (born 1973) is an American

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

known for being a co-creator of the

FFTW The Fastest Fourier Transform in the West (FFTW) is a software library for computing discrete Fourier transforms (DFTs) developed by Matteo Frigo and Steven G. Johnson at the Massachusetts Institute of Technology. FFTW is one of the fastest fre ...

library for software-based fast Fourier transforms and for his work on

photonic crystal A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic ...

s. He is professor of Applied Mathematics and Physics at

MIT The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the m ...

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 (

) library with funding from the

DoD NDSEG Fellowship The Department of Defense National Defense Science and Engineering Graduate Fellowship (DoD NDSEG) is a prestigious fellowship awarded annually to U.S. citizens pursuing doctoral degrees in science and engineering disciplines. The highly competit ...

. Steven Johnson and his colleague Matteo Frigo were awarded the 1999

J. H. Wilkinson Prize for Numerical Software The J. H. Wilkinson Prize for Numerical Software is awarded every four years to honor outstanding contributions in the field of numerical software. The award is named to commemorate the outstanding contributions of James H. Wilkinson in the same f ...

for this work. He is the author of th
NLOpt
library for nonlinear optimization. He is a frequent contributor to the

Julia Julia is usually a feminine given name. It is a Latinate feminine form of the name Julio and Julius. (For further details on etymology, see the Wiktionary entry "Julius".) The given name ''Julia'' had been in use throughout Late Antiquity (e.g ...

programming language, and has also contributed to

Python Python may refer to: Snakes * Pythonidae, a family of nonvenomous snakes found in Africa, Asia, and Australia ** ''Python'' (genus), a genus of Pythonidae found in Africa and Asia * Python (mythology), a mythical serpent Computing * Python (pro ...

, R, and

Matlab MATLAB (an abbreviation of "MATrix LABoratory") is a proprietary multi-paradigm programming language and numeric computing environment developed by MathWorks. MATLAB allows matrix manipulations, plotting of functions and data, implementa ...

. He was a keynote speaker for the 2019 JuliaCon conference.

References

External links

* Steven G. Johnson
Photonic-crystal and microstructured fiber tutorials
(2005). * John D. Joannopoulos, Steven G. Johnson, Joshua N. Winn, and Robert D. Meade,
Photonic Crystals: Molding the Flow of Light
', second edition (Princeton, 2008), chapter 9. (Readable online.) {{DEFAULTSORT:Johnson, Steven G. Living people Massachusetts Institute of Technology alumni American computer scientists MIT Department of Physics alumni Optical engineers Optical physicists 1973 births