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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 2731 | . 2 ⊢ ∅ = ∅ | |
| 2 | f1o00 6798 | . 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 4280 –1-1-onto→wf1o 6480 |
| 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 2113 ax-9 2121 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pr 5368 |
| 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 2535 df-clab 2710 df-cleq 2723 df-clel 2806 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-ss 3914 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-br 5090 df-opab 5152 df-id 5509 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 |
| This theorem is referenced by: en0 8940 en0r 8942 brwdom2 9459 cnfcom 9590 ackbij2lem2 10130 eupth0 30194 f1ocnt 32782 1arithidom 33502 iso0 44348 |
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