CorewiseGeometryOps.retract

t3toolbox.backend.geometry.CorewiseGeometryOps.retract(frame, variations, aux=None)

def retract(self, frame, variations, aux=None):

The additive retraction (U, G) += variations (mean-tied first when shared, which keeps tied-in giving tied-out; the group’s factors come back as one aliased array).