Keith Briggs is a mathematician notable for several world-record achievements in the field of computational mathematics: *The most accurate calculation of the

Feigenbaum constants In mathematics, specifically bifurcation theory, the Feigenbaum constants and are two mathematical constants which both express ratios in a bifurcation diagram for a non-linear map. They are named after the physicist Mitchell J. Feigenbaum. ...

, which was published in "A precise calculation of the Feigenbaum constants", ''Mathematics of Computation'', 57, 435–439. *The worst known badly approximable irrational pair ("Some explicit badly approximable pairs", ''Journal of Number Theory'', 103, 71). *The simplest known

universal differential equation A universal differential equation (UDE) is a non-trivial differential algebraic equation with the property that its solutions can approximate any continuous function on any interval of the real line to any desired level of accuracy. Precisely, a ...

*A significant number of contributions in the last 5 years to Sloane's

On-Line Encyclopedia of Integer Sequences The On-Line Encyclopedia of Integer Sequences (OEIS) is an online database of integer sequences. It was created and maintained by Neil Sloane while researching at AT&T Labs. He transferred the intellectual property and hosting of the OEIS to th ...

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. Many of these have involved major computations, such as the number of unlabelled graphs on up to 140 nodes. *The computation of the longest sequences of colossally abundant and super abundant numbers, and their application to a test of the

Riemann Hypothesis In mathematics, the Riemann hypothesis is the conjecture that the Riemann zeta function has its zeros only at the negative even integers and complex numbers with real part . Many consider it to be the most important unsolved problem in pure ...

(''Experimental Mathematics'', 15, 251–256). An article about him was in ''i-squared Magazine'', Issue 6 (Winter 2008/9).''iSquared Magazine'', Issue

Retrieved 2014-11-16

Local history in Suffolk

He also studies the etymology of

place-name Toponymy, toponymics, or toponomastics is the study of '' toponyms'' (proper names of places, also known as place names and geographic names), including their origins, meanings, usage, and types. ''Toponym'' is the general term for a proper nam ...

s, and Middle English etymology, phonology, and semantics (especially in East Anglia), as evidenced by onomastic data.

Selected texts

* 199
"A precise calculation of the Feigenbaum constants", ''Mathematics of Computation'', 57, 435–439.

References

{{DEFAULTSORT:Briggs, Keith 21st-century English mathematicians Toponymists Year of birth missing (living people) Living people