Structures · Algebra
IsSemireal
A semireal ring is a commutative ring (with unit) in which -1 is not a sum of
squares. We define the predicate IsSemireal R for structures R equipped with
a multiplication, an addition, a multiplicative unit and an additive unit.
- Defined in
- Mathlib.Algebra.Ring.Semireal.Defs
- Shape
- One type argument · adds one_add_ne_zero
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