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| Description: Lemma for mapdom2 4480. |
| Ref | Expression |
|---|---|
| mapdom1.1 |
|
| mapdom1.2 |
|
| mapdom1.3 |
|
| Ref | Expression |
|---|---|
| mapdom2lem |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mapdom1.3 |
. . . . . . 7
| |
| 2 | visset 1809 |
. . . . . . 7
| |
| 3 | 1, 2 | elmap 4324 |
. . . . . 6
|
| 4 | fdm 3623 |
. . . . . 6
| |
| 5 | 3, 4 | sylbi 199 |
. . . . 5
|
| 6 | visset 1809 |
. . . . . . . 8
| |
| 7 | 6 | fconst 3649 |
. . . . . . 7
|
| 8 | fdm 3623 |
. . . . . . 7
| |
| 9 | 7, 8 | ax-mp 7 |
. . . . . 6
|
| 10 | 9 | a1i 8 |
. . . . 5
|
| 11 | 5, 10 | ineq12d 2214 |
. . . 4
|
| 12 | difdisj 2333 |
. . . 4
| |
| 13 | 11, 12 | syl6eq 1520 |
. . 3
|
| 14 | dmin 3313 |
. . . . 5
| |
| 15 | sseq2 2079 |
. . . . 5
| |
| 16 | 14, 15 | mpbii 193 |
. . . 4
|
| 17 | ss0 2299 |
. . . 4
| |
| 18 | 16, 17 | syl 10 |
. . 3
|
| 19 | 13, 18 | syl 10 |
. 2
|
| 20 | relxp 3250 |
. . . . 5
| |
| 21 | relin1 3257 |
. . . . 5
| |
| 22 | 20, 21 | ax-mp 7 |
. . . 4
|
| 23 | incom 2204 |
. . . . 5
| |
| 24 | 23 | releqi 3239 |
. . . 4
|
| 25 | 22, 24 | mpbi 189 |
. . 3
|
| 26 | reldm0 3326 |
. . 3
| |
| 27 | 25, 26 | ax-mp 7 |
. 2
|
| 28 | 19, 27 | sylibr 200 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: mapdom2 4480 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-nul 2705 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-ral 1646 df-rex 1647 df-v 1808 df-sbc 1938 df-csb 1998 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-opab 2662 df-id 2830 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-fv 3193 df-opr 3956 df-oprab 3957 df-map 4314 |