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Edward Grundy's avatar

"Ugly bags of mostly entropy"

Entropy in physics and computer science feel quite different, but surely must be the same, surely...

Regardless: in functional algebra a function f maps between a domain (the set of inputs) and the codomain (the set of outputs). If the codomain is a strict subset of the domain, not all inputs can be completely reconstructed from the output. This gives a "cause" for entropy-like behaviour in mathematical systems. It can also explain, if you wave your hands around, why time is local and irreversible.

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