circle_bundles.Torus_DiagQuotientMetric_R4

circle_bundles.Torus_DiagQuotientMetric_R4(*, base_in='z2')[source]

Z2 quotient metric on R^4 C^2-torus embedding for the diagonal pi-shift:: (base,fiber) ~ (base+pi, fiber+pi)

This is symmetric under swapping base/fiber, but we keep base_in for API consistency.