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Mirrors > Home > MPE Home > Th. List > imassrn | Structured version Visualization version Unicode version |
Description: The image of a class is a subset of its range. Theorem 3.16(xi) of [Monk1] p. 39. (Contributed by NM, 31-Mar-1995.) |
Ref | Expression |
---|---|
imassrn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | exsimpr 1796 | . . 3 | |
2 | 1 | ss2abi 3674 | . 2 |
3 | dfima3 5469 | . 2 | |
4 | dfrn3 5312 | . 2 | |
5 | 2, 3, 4 | 3sstr4i 3644 | 1 |
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