| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: The domain of a set is a set. Corollary 6.8(2) of [TakeutiZaring] p. 26. |
| Ref | Expression |
|---|---|
| dmex.1 |
|
| Ref | Expression |
|---|---|
| dmex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmex.1 |
. 2
| |
| 2 | dmexg 3364 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: elxp4 3459 tfrlem8 3924 1stval 4087 fo1st 4097 mapprc 4332 breng 4381 brdomg 4382 fundmen 4434 xpmapenlem2 4503 aceq3lem 4742 brdom3 4811 brdom5 4812 brdom4 4813 metxp 7831 bcthlem12 8007 bcthlem15 8010 bcthlem30 8025 ipfval 8348 hmoval 8466 ishoma 10686 ishomb 10687 ismona 10708 isepia 10718 isfuna 10725 idfisf 10731 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-pow 2748 ax-pr 2785 ax-un 2872 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-uni 2508 df-br 2625 df-opab 2672 df-cnv 3192 df-dm 3194 df-rn 3195 |