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Unformatted text preview: e parallel resistance formula this leads to a nal correct result
of 1=1 = 0.
It is, of course, true that a 0 has the value 0 for any nite value of a.
Similarly, we can adopt the convention that a=0 = 1 for any positive value
of a. Multiplication with 1 also makes sense: a 1 has the value 1 for any
positive value of a. But the expressions 1 0 and 0=0 make no mathematical
sense. An attempt to compute either of these quantities is called an invalid
operation, and the IEEE standard calls for the result of such an operation to
be set to NaN (Not a Number). Any arithmetic operation on a NaN gives a
NaN result, so any subsequent computation with expressions which have a
NaN value are themselves assigned a NaN value. When a NaN is discovered
in the output of a program, the programmer knows something has gone wrong
and can invoke debugging tools to determine what the problem is. This may
be assisted by the fact that the bitstring in the fraction eld can be used to
code the origin of the NaN. Consequently, we...
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This note was uploaded on 02/12/2014 for the course MATH 4800 taught by Professor Lie during the Spring '09 term at Rensselaer Polytechnic Institute.
 Spring '09
 LIE

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