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Mirrors > Home > NFE Home > Th. List > funforn | Unicode version |
Description: A function maps its domain onto its range. (Contributed by set.mm contributors, 23-Jul-2004.) |
Ref | Expression |
---|---|
funforn |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | funfn 5136 |
. 2
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2 | dffn4 5275 |
. 2
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3 | 1, 2 | bitri 240 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 ax-gen 1546 ax-ext 2334 |
This theorem depends on definitions: df-bi 177 df-an 360 df-cleq 2346 df-fn 4790 df-fo 4793 |
This theorem is referenced by: (None) |
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