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Mirrors > Home > MPE Home > Th. List > cnvimass | Structured version Visualization version Unicode version |
Description: A preimage under any class is included in the domain of the class. (Contributed by FL, 29-Jan-2007.) |
Ref | Expression |
---|---|
cnvimass |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imassrn 5178 |
. 2
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2 | dfdm4 5026 |
. 2
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3 | 1, 2 | sseqtr4i 3464 |
1
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