Unums and Posits™



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Gustafson's Law

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Atanasoff-Berry Computer

Benchmarking & Performance

Fun Stuff

Podcast: John Gustafson on What's Next for Parallel Computing


The End of Error

Chapman & Hall/CRC Computational Science, ISBN-13: 978-1482239867

From Amazon:

Written by one of the foremost experts in high-performance computing and the inventor of Gustafson's Law, The End of Error: Unum Computing explains a new approach to computer arithmetic: the universal number (unum). The unum encompasses all IEEE floating-point formats as well as fixed-point and exact integer arithmetic. This new number type obtains more accurate answers than floating-point arithmetic yet uses fewer bits in many cases, saving memory, bandwidth, energy, and power.

The Unum debate with William Kahan

The video
The transcript


TMO Background Mode Interview with Professor of Computer Science Dr. John Gustafson

Open Gov Asia

Publications about Unums

Beating Floating Point at its Own Game: Posit Arithmetic

"Unums 2.0: An interview with John L. Gustafson", 2016

"The End of (Numeric) Error: An Interview with John L. Gustafson", 2016

A Radical Approach to Computation with Real Numbers, Supercomputing Frontiers and Innovations, vol 3, number 2, 2016.

InsideHPC: John Gustafson Explains Energy Efficient Unum Computing

A Radical Approach to Computation with Real Numbers


A Radical Approach to Computation with Real Numbers
PowerPoint version

PDF version

An Energy-Efficient And Massively Parallel Approach To Valid Numerics
PowerPoint version

PDF version

Unleashed Computing: The need to right-size precision to save energy, bandwidth, storage, and electrical power
PDF version

Copyright © Dr. John L. Gustafson. All Rights Reserved.