Report on vintage "Programmer Electronnic Control" alias "RAF Tornado Computer"
lbickley at bickleywest.com
Fri Mar 9 09:31:09 CST 2007
On Friday 09 March 2007 02:05, Erik Baigar wrote:
> Hi Lyle,
> thank you very much for your email.
> P.S. > "Black holes are where God is dividing by zero"
> How do you explain the different sizes of black holes?
Division by zero produces a NaN (Not a Number) - and IEEE 754 NaNs are
represented with the exponential field filled with ones and some non-zero
number in the mantissa.
A bit-wise example of a IEEE floating-point standard single precision NaN:
x11111111axxxxxxxxxxxxxxxxxxxxxx. x = undefined. Therefore, since x is
undefined, there are many possible valid results - and therefore varying
sizes of black holes ;-)
Bickley Consulting West Inc.
Mountain View, CA
"Black holes are where God is dividing by zero"
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