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| Mirrors > Home > ILE Home > Th. List > tpos0 | GIF version | ||
| Description: Transposition of the empty set. (Contributed by NM, 10-Sep-2015.) |
| Ref | Expression |
|---|---|
| tpos0 | ⊢ tpos ∅ = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rel0 4858 | . . . 4 ⊢ Rel ∅ | |
| 2 | eqid 2231 | . . . . 5 ⊢ ∅ = ∅ | |
| 3 | fn0 5459 | . . . . 5 ⊢ (∅ Fn ∅ ↔ ∅ = ∅) | |
| 4 | 2, 3 | mpbir 146 | . . . 4 ⊢ ∅ Fn ∅ |
| 5 | tposfn2 6475 | . . . 4 ⊢ (Rel ∅ → (∅ Fn ∅ → tpos ∅ Fn ◡∅)) | |
| 6 | 1, 4, 5 | mp2 16 | . . 3 ⊢ tpos ∅ Fn ◡∅ |
| 7 | cnv0 5147 | . . . 4 ⊢ ◡∅ = ∅ | |
| 8 | 7 | fneq2i 5432 | . . 3 ⊢ (tpos ∅ Fn ◡∅ ↔ tpos ∅ Fn ∅) |
| 9 | 6, 8 | mpbi 145 | . 2 ⊢ tpos ∅ Fn ∅ |
| 10 | fn0 5459 | . 2 ⊢ (tpos ∅ Fn ∅ ↔ tpos ∅ = ∅) | |
| 11 | 9, 10 | mpbi 145 | 1 ⊢ tpos ∅ = ∅ |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 ∅c0 3496 ◡ccnv 4730 Rel wrel 4736 Fn wfn 5328 tpos ctpos 6453 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-sbc 3033 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-fv 5341 df-tpos 6454 |
| This theorem is referenced by: (None) |
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