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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | exsimpr 1796 |
. . 3
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2 | 1 | ss2abi 3674 |
. 2
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3 | dfima3 5469 |
. 2
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4 | dfrn3 5312 |
. 2
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5 | 2, 3, 4 | 3sstr4i 3644 |
1
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