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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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