The Symmetric Level-Index System
C. W. Clenshaw, PETER R. TURNER · IMA Journal of Numerical Analysis · 1988
The purpose of this paper is to present the details of an arithmetic system which virtually abolishes the phenomena of computer overflow and underflow in a logically symmetric manner. A generalized exponential function is used in such a way as to enable very large numbers to be represented with a uniform precision, and very small numbers by reciprocation.