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| Description: Lemma for mapdom2 5588. |
| Ref | Expression |
|---|---|
| mapdom1.1 |
|
| mapdom1.2 |
|
| mapdom1.3 |
|
| Ref | Expression |
|---|---|
| mapdom2lem |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mapdom1.3 |
. . . . . . 7
| |
| 2 | visset 2295 |
. . . . . . 7
| |
| 3 | 1, 2 | elmap 5393 |
. . . . . 6
|
| 4 | fdm 4567 |
. . . . . 6
| |
| 5 | 3, 4 | sylbi 216 |
. . . . 5
|
| 6 | visset 2295 |
. . . . . . . 8
| |
| 7 | 6 | fconst 4602 |
. . . . . . 7
|
| 8 | 7 | fdmi 4568 |
. . . . . 6
|
| 9 | 8 | a1i 8 |
. . . . 5
|
| 10 | 5, 9 | ineq12d 2797 |
. . . 4
|
| 11 | difdisj 2945 |
. . . 4
| |
| 12 | 10, 11 | syl6eq 1944 |
. . 3
|
| 13 | dmin 4165 |
. . . . 5
| |
| 14 | sseq2 2639 |
. . . . 5
| |
| 15 | 13, 14 | mpbii 210 |
. . . 4
|
| 16 | ss0 2902 |
. . . 4
| |
| 17 | 15, 16 | syl 12 |
. . 3
|
| 18 | 12, 17 | syl 12 |
. 2
|
| 19 | relxp 4088 |
. . . . 5
| |
| 20 | relin1 4098 |
. . . . 5
| |
| 21 | 19, 20 | ax-mp 7 |
. . . 4
|
| 22 | incom 2787 |
. . . . 5
| |
| 23 | 22 | releqi 4072 |
. . . 4
|
| 24 | 21, 23 | mpbi 206 |
. . 3
|
| 25 | reldm0 4176 |
. . 3
| |
| 26 | 24, 25 | ax-mp 7 |
. 2
|
| 27 | 18, 26 | sylibr 217 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: mapdom2 5588 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-rep 3428 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3an 860 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-v 2294 df-sbc 2454 df-csb 2541 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fn 4009 df-f 4010 df-fv 4014 df-opr 4886 df-oprab 4887 df-map 5383 |