# double precision

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## double precision

[¦dəb·əl prə′sizh·ən]
(computer science)
The use of two computer words to represent a double-length number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## double precision

Using two computer words instead of one to hold a number used for calculations, thus allowing twice as large a number for more arithmetic precision. Contrast with single precision.
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References in periodicals archive ?
Finally, due to the very high accuracy achieved by the approximate prolate and Knab window as well as the NUFFT, the minimum achieved coherence values have been, for the double precision case, equal to 1 in all the three cases.
else Compute and factor A[D.sup.2][A.sup.T] in double precision non-packed form using the CPU.
However, in single precision and double precision a change in the underflow strategy, as well as double rounding in some underflow cases, was detected by our test tool.
In the case of the supercomputers (CRAY Y-MP, NEC SX-2, and CRAY-2), single and double precision correspond to 64 and 128 bits.
As a result, for the case of [n.sub.C] = 4 and [n.sub.G] = 2, the optimum solution of [N.sub.C]/(N/2) equals 0.016 and 0.083 for single and double precision, respectively.
Furthermore, for double precision, based on the function fetch_double (), we rewrite
Notice how by increasing the size of the block, the execution time decreases exponentially to a limit or an asymptotic time which in double precision is of 81 s and in single precision of 37 s.
* computations in double precision are performed four times faster.
The Quadro 4000 for the Mac also features fast 64-bit double precision floating point capabilities to ensure accurate results in the case of mission critical applications, such as medical imaging and structural analysis.

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