Klein

Klein, founded by mathematician Felix Klein, refers to multiple concepts in mathematics. One notable example is Klein's bottle, a four-dimensional shape that looks like a bottle with no inside or outside, essentially a continuous loop with a twist. Klein also contributed to group theory, helping classify symmetries and geometries. His work bridges algebra and geometry, enhancing our understanding of complex structures. In simple terms, Klein's ideas involve understanding shapes, symmetries, and mathematical patterns that underlie the universe, often revealing surprising connections between different fields of mathematics.