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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 2734 | . 2 ⊢ ∅ = ∅ | |
| 2 | f1o00 6807 | . 2 ⊢ (∅:∅–1-1-onto→∅ ↔ (∅ = ∅ ∧ ∅ = ∅)) | |
| 3 | 1, 1, 2 | mpbir2an 711 | 1 ⊢ ∅:∅–1-1-onto→∅ |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∅c0 4283 –1-1-onto→wf1o 6489 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-mo 2537 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-br 5097 df-opab 5159 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 |
| This theorem is referenced by: en0 8953 en0r 8955 brwdom2 9476 cnfcom 9607 ackbij2lem2 10147 eupth0 30238 f1ocnt 32829 1arithidom 33567 iso0 44490 |
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