A surname of German origin, or in geometry, a closed curve that doesn't intersect itself. Also refers to the Klein bottle in topology.
German 'klein' meaning 'small'. As a mathematical term, named after Felix Klein (1849-1925), German mathematician who contributed to geometry and topology. The Klein bottle concept emerged from his work on non-orientable surfaces.
The Klein bottle is one of mathematics' most mind-bending objects - a surface that has no inside or outside, existing only in four-dimensional space. It's like a Möbius strip taken to the extreme, challenging our basic assumptions about containers and boundaries.
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