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| Mirrors > Home > MPE Home > Th. List > f1o0 | Structured version Visualization version GIF version | ||
| Description: One-to-one onto mapping of the empty set. (Contributed by NM, 10-Sep-2004.) |
| Ref | Expression |
|---|---|
| f1o0 | ⊢ ∅:∅–1-1-onto→∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2763 | . 2 ⊢ ∅ = ∅ | |
| 2 | f1o00 6856 | . 2 ⊢ (∅:∅–1-1-onto→∅ ↔ (∅ = ∅ ∧ ∅ = ∅)) | |
| 3 | 1, 1, 2 | mpbir2an 723 | 1 ⊢ ∅:∅–1-1-onto→∅ |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ∅c0 4286 –1-1-onto→wf1o 6535 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 |
| This theorem is referenced by: en0 9011 en0r 9013 brwdom2 9531 cnfcom 9665 ackbij2lem2 10218 eupth0 30565 f1ocnt 33145 1arithidom 33827 iso0 45017 |
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