commutativity
61CA-group — In mathematics, in the realm of group theory, a group is said to be a CA group or centralizer abelian group if the centralizer of any nonidentity element is an abelian subgroup. Finite CA groups are of historical importance as an early example of …
62Noncommutative ring — In mathematics, more specifically modern algebra and ring theory, a noncommutative ring is a ring whose multiplication is not commutative; that is, if R is a noncommutative ring, there exists a and b in R with a·b ≠ b·a, and conversely.… …
63Outline of logic — The following outline is provided as an overview of and topical guide to logic: Logic – formal science of using reason, considered a branch of both philosophy and mathematics. Logic investigates and classifies the structure of statements and… …
64Commutative — Com*mut a*tive, a. [CF. F. commutatif.] 1. Relative to exchange; interchangeable; reciprocal. {Com*mut a*tive ly}, adv. [1913 Webster] Rich traders, from their success, are presumed . . . to have cultivated an habitual regard to commutative… …
65Commutatively — Commutative Com*mut a*tive, a. [CF. F. commutatif.] 1. Relative to exchange; interchangeable; reciprocal. {Com*mut a*tive ly}, adv. [1913 Webster] Rich traders, from their success, are presumed . . . to have cultivated an habitual regard to… …
66normal — I. adjective Etymology: Latin normalis, from norma Date: circa 1696 1. perpendicular; especially perpendicular to a tangent at a point of tangency 2. a. according with, constituting, or not deviating from a norm, rule, or principle b. conforming… …
67Arithmetic — tables for children, Lausanne, 1835 Arithmetic or arithmetics (from the Greek word ἀριθμός, arithmos “number”) is the oldest and most elementary branch of mathematics, used b …
68Bra-ket notation — Quantum mechanics Uncertainty principle …
69Complex number — A complex number can be visually represented as a pair of numbers forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the square root of –1. A complex… …
70Convex set — A convex set …
