| 释义 |
unipotent, a.|juːnɪˈpəʊtənt|
[f. uni- 1 + potent a.1 and n.2]
1. Algebra. (a) Of a semigroup: having only one idempotent element; (b) of a matrix or linear transformation: having the single eigenvalue 1.
1954T. Tamura in Kōdai Math. Seminar Rep. 93/1 A semigroup with only one idempotent is called unipotent. 1972Jrnl. Algebra XXIII. 137 Let k be an algebraically closed field, and G an affine algebraic group defined over k. An element in G is called semisimple if it is diagonalizable and unipotent if each of its eigenvalues equals 1. 1988Acta Math. Sinica IV. 49 We place an additional prerequisite that G has no non-trivial unipotent quotient group or G has a unipotent quotient group of dimension ≥2.
2. (Formerly at uni- 1 a.) Med. and Biol. Of a cell: capable of giving rise to only one type of cell or tissue.
1974Brit. Jrnl. Haematol. XXVI. 605 Stem cells are assayed by quantifying their progeny. In techniques measuring cells of one lineage this measurement reflects the number of unipotent stem cells. 1979Nature 18 Jan. 177/1 Such a cell is unipotent and exclusively committed to maturation along the erythroid pathway. |