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| Description: A mapping is a class of ordered pairs. |
| Ref | Expression |
|---|---|
| fssxp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | frn 3624 |
. . . 4
| |
| 2 | ssid 2076 |
. . . . 5
| |
| 3 | ssxp 3251 |
. . . . 5
| |
| 4 | 2, 3 | mpan 694 |
. . . 4
|
| 5 | 1, 4 | syl 10 |
. . 3
|
| 6 | fdm 3623 |
. . . 4
| |
| 7 | xpeq1 3195 |
. . . 4
| |
| 8 | sseq1 2078 |
. . . 4
| |
| 9 | 6, 7, 8 | 3syl 20 |
. . 3
|
| 10 | 5, 9 | mpbird 196 |
. 2
|
| 11 | frel 3622 |
. . 3
| |
| 12 | relssdr 3505 |
. . 3
| |
| 13 | sstr2 2067 |
. . 3
| |
| 14 | 11, 12, 13 | 3syl 20 |
. 2
|
| 15 | 10, 14 | mpd 26 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: funssxp 3629 opelf 3631 fabexg 3644 dff4 3807 dff2 3808 fopabssxp 3815 mapex 4318 mapval2 4325 mapsspw 4331 uniixp 4347 infmap2 7531 lmbrf 7882 iscauf 7891 iscau5 7893 lmclimnn 7915 h2hcau 8788 h2hlm 8789 1alg 10534 |
| 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-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-sep 2698 ax-pow 2737 ax-pr 2774 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 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-v 1808 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-br 2615 df-opab 2662 df-xp 3179 df-rel 3180 df-cnv 3181 df-dm 3183 df-rn 3184 df-fun 3187 df-fn 3188 df-f 3189 |