add ishalfodd in the documentation because HalfIntegers.jl#59 takes…

… time
JuliaGeometry · Feb 3, 2024 · 1873339 · 1873339
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commit 1873339
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diff --git a/docs/src/examples/type_parameter.md b/docs/src/examples/type_parameter.md
@@ -40,6 +40,7 @@ using HalfIntegers
 q1 = Quaternion{HalfInt}(1, 2, 3, 4)
 q2 = Quaternion{HalfInt}(5.5, 6.5, 7.5, 8.5)
 q3 = Quaternion{HalfInt}(1, 2, 3, 4.5)  # not Hurwitz quaternion
+ishalfodd(x::Number) = isodd(twice(x))  # Should be defined in HalfIntegers.jl (HalfIntegers.jl#59)
 ishurwitz(q::Quaternion) = (isinteger(q.s) & isinteger(q.v1) & isinteger(q.v2) & isinteger(q.v3)) | (ishalfodd(q.s) & ishalfodd(q.v1) & ishalfodd(q.v2) & ishalfodd(q.v3))
 ishurwitz(q1)
 ishurwitz(q2)