Software for Interval Arithmetic: A Reasonably Portable Package

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Abstract
The design and capabflltms of a package of Fortran subroutines for performing mterval arithmetic calculations are discussed Apart from a relatively small number of primitives and constants, the package Is directly transferrable to most large scale computers, and has been successfully implemented on IBM, CDC, DEC, and Honeywell eqmpment m additmn to the UNIVAC 1110 This package has been designed to be compatible with the AUGMENT precompiler, it includes interval analogs of appropriate standard Fortran operatmns and functions, as well as operatmns and functions peculiar to interval arithmetic. The result is that the user who has access to AUGMENT may write programs usmg interval arithmetic just as though Fortran recogmzed INTERVAL as a standard data type.

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