释义 |
preimage Math.|priːˈɪmɪdʒ| [pre- A. 2.] = inverse image s.v. image n. 8.
1949F. Blum tr. B. L. Van der Waerden's Mod. Algebra I. i. 3 The element ϕ(a) is called the image of a, while a is an inverse image (pre-image) of ϕ(a). 1958[see into adj.]. 1975N. Chomsky Logical Struct. Linguistic Theory ix. 317 T carries the elements of its domain into strings of p which differ from one another and from their preimages in the sense of condition C6. |