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Minimiser


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Description

Summary

Two-level minimisation of a boolean expression by Quine-McCluskey: the minterms where
it holds are combined into prime implicants, and a cover is chosen from those.

Remarks

The rewrite rules reach absorption and nothing past it, so
a and b or a and not b stopped at a and (b or not b) -- the factoring is
right and there is no rule to finish it, because b or not b has none reducing it
to true. One classical algorithm covers that, excluded middle, non-contradiction
and every larger cover at once, where each would otherwise be its own rule.
#768

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