August Ferdinand Möbius German mathematician and astronomer noted for contributions to projective geometry, barycentric ideas and topology, best known for the Möbius strip and work at the University of Le…
Interval (mathematics) An interval is a connected subset of the real numbers containing every point between two endpoints. Intervals can be open, closed, half-open, bounded or unbounded and are fundament…
Seven Bridges of Königsberg: Euler's problem and the birth of graph theory Seven Bridges of Königsberg A clear account of the Seven Bridges of Königsberg problem, Euler's 1735 solution, its abstraction into graph theory, criteria for Eulerian walks, and modern significance.
