[isabelle-dev] type class ordered_semiring_1

[Florian Haftmann]

> But why zero_neq_one rather than zero_less_one? Are there really ordered semirings where 0<1 does not hold? Other AFP entries use that version.

Surely, for an ordering 0 < 1 is a reasonable assumption if 0 =/= 1.

	Florian

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