Klein bottle

Definitions

1. The closed manifold obtained by identifying the boundary components of the annulus so that the resultant surface is nonorientable.
2. A physical bottle, usually of blown glass, made to resemble said shape.

Equivalents

Examples

“At this level Atman and Brahman are like⟳ a Klein bottle or a Möbius strip⟳: there is no edge where one can say⟳ that this is Atman, but this is Brahman.”

CEFR level