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The Inverse Symbolic Calculator is an online
number checker established July 18, 1995 by
Peter Benjamin Borwein,
Jonathan Michael Borwein and
Simon Plouffe
Simon Plouffe (born June 11, 1956) is a mathematician who discovered the Bailey–Borwein–Plouffe formula (BBP algorithm) which permits the computation of the ''n''th binary digit of π, in 1995. His other 2022 formula allows extracting the '' ...
of the Canadian Centre for Experimental and Constructive Mathematics (Burnaby, Canada). A user will input a number and the Calculator will use an algorithm to search for and calculate
closed-form expression
In mathematics, a closed-form expression is a mathematical expression that uses a finite number of standard operations. It may contain constants, variables, certain well-known operations (e.g., + − × ÷), and functions (e.g., ''n''th ro ...
s or suitable functions that have roots near this number. Hence, the calculator is of great importance for those working in numerical areas of
experimental mathematics
Experimental mathematics is an approach to mathematics in which computation is used to investigate mathematical objects and identify properties and patterns. It has been defined as "that branch of mathematics that concerns itself ultimately with th ...
.
The ISC contains 54 million mathematical constants.
Plouffe's Inverter (opened in 1998) contains 214 million. A newer version of the tables with 3.702 billion entries (as of June 19, 2010) exists.
In 2016, Plouffe released a portable version of Plouffe's Inverter containing 3 billion entries.
Literature
*
John Conway,
Richard K. Guy: ''Zahlenzauber'' (The Book of Numbers), End of Chapter 1 about Numbers in languages. Birkhäuser, 1997, .
See also
*
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 ...
References
External links
Inverse Symbolic CalculatorInverse Symbolic Calculator 2.0Plouffe's InverterPortable version of the Plouffe Inverter
Mathematical databases
Experimental mathematics
Internet properties established in 1995
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