Definitions

from The Century Dictionary.

  • noun In algebra, an oblong block of figures, denoting the sum of a number of products, each consisting of as many factors as the block has rows, and each factor being formed by compounding as umbræ the constituents in one row, the different terms being due to permutation with change of sign, in every possible way, of the constituents of every column after the first.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun algebra, logic The subset of all elements of a semigroup that commute with the elements of a given subset

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

commute +‎ -ant

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