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| Description: The cross product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. |
| Ref | Expression |
|---|---|
| xpexg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | unexg 2880 |
. . 3
| |
| 2 | pwexg 2752 |
. . 3
| |
| 3 | 1, 2 | syl 10 |
. 2
|
| 4 | pwexg 2752 |
. 2
| |
| 5 | xpsspw 3263 |
. . 3
| |
| 6 | ssexg 2726 |
. . 3
| |
| 7 | 5, 6 | mpan 697 |
. 2
|
| 8 | 3, 4, 7 | 3syl 20 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: xpex 3266 resiexg 3402 cnvexg 3525 coexg 3530 resfunexg 3585 cofunexg 3586 fnex 3613 fabexg 3659 oprabex2g 4026 pmex 4333 mapex 4334 ixpexg 4364 fodomr 4489 cdavalt 4931 lmfval 7922 caufval 7923 lmbr 7925 iscau 7933 isvc 8196 inposet 10477 |
| 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-opab 2672 df-xp 3190 df-rel 3191 |