| Metamath Proof Explorer |
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| Description: A function's value belongs to its codomain. |
| Ref | Expression |
|---|---|
| ffvrn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnfvrn 2889 |
. . 3
| |
| 2 | ffn 2752 |
. . 3
| |
| 3 | 1, 2 | sylan 343 |
. 2
|
| 4 | frn 2757 |
. . . 4
| |
| 5 | 4 | sseld 1506 |
. . 3
|
| 6 | 5 | adantr 306 |
. 2
|
| 7 | 3, 6 | mpd 46 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: fopab2 2891 ffnfv 2892 fsn2 2896 fvconst 2899 isocnv 2934 isotr 2935 isotrALT 2936 omsmolem 3195 omsmo 3196 2dom 3332 xpdom2 3345 pw2en 3348 mapenlem2 3385 mapxpen 3390 xpmapenlem3 3393 xpmapenlem4 3394 xpmapenlem5 3395 fiint 3445 uzrdgsuc 4659 seqrn 4673 seqrn2 4674 climunii 4883 ruclem13 4897 ruclem15 4899 ruclem22 4906 ruclem23 4907 ruclem24 4908 ruclem25 4909 ruclem26 4910 ruclem27 4911 ruclem28 4912 ruclem29 4913 hlimcaui 5141 hlimunii 5143 occllem4 5183 occllem6 5185 occl 5188 projlem21 5213 projlem24 5216 projlem25 5217 projlem26 5218 hosclt 5491 hodclt 5492 osumlem4 5533 osumlem5 5534 hocl 5594 stclt 5672 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-fv 2438 |