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| Mirrors > Home > MPE Home > Th. List > tpos0 | Structured version Visualization version GIF version | ||
| Description: Transposition of the empty set. (Contributed by NM, 10-Sep-2015.) |
| Ref | Expression |
|---|---|
| tpos0 | ⊢ tpos ∅ = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rel0 5748 | . . . 4 ⊢ Rel ∅ | |
| 2 | eqid 2736 | . . . . 5 ⊢ ∅ = ∅ | |
| 3 | fn0 6623 | . . . . 5 ⊢ (∅ Fn ∅ ↔ ∅ = ∅) | |
| 4 | 2, 3 | mpbir 231 | . . . 4 ⊢ ∅ Fn ∅ |
| 5 | tposfn2 8190 | . . . 4 ⊢ (Rel ∅ → (∅ Fn ∅ → tpos ∅ Fn ◡∅)) | |
| 6 | 1, 4, 5 | mp2 9 | . . 3 ⊢ tpos ∅ Fn ◡∅ |
| 7 | cnv0 6097 | . . . 4 ⊢ ◡∅ = ∅ | |
| 8 | 7 | fneq2i 6590 | . . 3 ⊢ (tpos ∅ Fn ◡∅ ↔ tpos ∅ Fn ∅) |
| 9 | 6, 8 | mpbi 230 | . 2 ⊢ tpos ∅ Fn ∅ |
| 10 | fn0 6623 | . 2 ⊢ (tpos ∅ Fn ∅ ↔ tpos ∅ = ∅) | |
| 11 | 9, 10 | mpbi 230 | 1 ⊢ tpos ∅ = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∅c0 4285 ◡ccnv 5623 Rel wrel 5629 Fn wfn 6487 tpos ctpos 8167 |
| 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-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| 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-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-fv 6500 df-tpos 8168 |
| This theorem is referenced by: oppchomfval 17637 oppgplusfval 19277 opprmulfval 20275 termolmd 49911 |
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