1 unit circle identity matrix 1/2 + 1/4 + 1/8 + 1/16 + ⋯ one-hot hapax legomenon root of unity identity element unit fraction unit (ring theory) legendre's constant normalizing constant unit sphere one-form empty product matrix of ones uniqueness quantification one-dimensional space turn (angle) single-speed bicycle monogon unit disk unit hyperbola unit square −1 one-parameter group unit cube unipedalism unit function single-entry matrix
Mathematics_Mathematical constants