Infinity: N. 1. The Largest Value That Can Be Represented In A Particular Type Of Variable (register, Memory Location, Data Type, Whatever).

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:infinity: n. 1. The largest value that can be represented in a
particular type of variable (register, memory location, data type,
whatever). 2. `minus infinity': The smallest such value, not
necessarily or even usually the simple negation of plus infinity.
In N-bit twos-complement arithmetic, infinity is
2^(N-1) - 1 but minus infinity is - (2^(N-1)),
not -(2^(N-1) - 1). Note also that this is different from
"time T equals minus infinity", which is closer to a
mathematician's usage of infinity.
-- The AI Hackers Dictionary

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