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| Description: The converse of a set is a set. Corollary 6.8(1) of [TakeutiZaring] p. 26. |
| Ref | Expression |
|---|---|
| cnvexg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 4419 |
. . 3
| |
| 2 | relssdmrn 4516 |
. . 3
| |
| 3 | 1, 2 | ax-mp 7 |
. 2
|
| 4 | df-rn 4138 |
. . . 4
| |
| 5 | rnexg 4329 |
. . . 4
| |
| 6 | 4, 5 | syl5eqelr 2224 |
. . 3
|
| 7 | dfdm4 4277 |
. . . 4
| |
| 8 | dmexg 4328 |
. . . 4
| |
| 9 | 7, 8 | syl5eqelr 2224 |
. . 3
|
| 10 | xpexg 4225 |
. . 3
| |
| 11 | 6, 9, 10 | syl11anc 659 |
. 2
|
| 12 | ssexg 3624 |
. 2
| |
| 13 | 3, 11, 12 | sylancr 662 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: cnvex 4528 relcnvexb 4529 cofunex2g 4601 fodom 6374 tx1cn 11058 tx2cn 11059 cnvhmpha 11075 cncomp 11169 injrec2 15178 dupre1 15323 dupos1 15325 dutos1 15365 supwval 15368 mapdiscnlem 15627 cnvhmphb 15637 cnvhmph 15638 hmphsyma 15639 intopcoaconb 15662 intopcoaconc 15663 prcnt 15686 cnconn 16268 cnres 16713 hmeocnv 16722 xpexb 17259 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1592 ax-gen 1593 ax-8 1594 ax-9 1595 ax-10 1596 ax-11 1597 ax-12 1598 ax-13 1599 ax-14 1600 ax-17 1605 ax-4 1608 ax-5o 1610 ax-6o 1613 ax-9o 1763 ax-10o 1781 ax-16 1854 ax-11o 1864 ax-ext 2123 ax-sep 3606 ax-nul 3613 ax-pow 3649 ax-pr 3687 ax-un 3929 |
| This theorem depends on definitions: df-bi 220 df-or 338 df-an 339 df-ex 1616 df-sb 1816 df-eu 2041 df-mo 2042 df-clab 2129 df-cleq 2134 df-clel 2137 df-ne 2268 df-rex 2360 df-v 2540 df-dif 2830 df-un 2832 df-in 2834 df-ss 2836 df-nul 3083 df-pw 3229 df-sn 3242 df-pr 3243 df-op 3246 df-uni 3367 df-br 3508 df-opab 3566 df-xp 4133 df-rel 4134 df-cnv 4135 df-dm 4137 df-rn 4138 |