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| Mirrors > Home > ILE Home > Th. List > xpex | GIF version | ||
| Description: The cross product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpex.1 | ⊢ 𝐴 ∈ V |
| xpex.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| xpex | ⊢ (𝐴 × 𝐵) ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpex.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | xpex.2 | . 2 ⊢ 𝐵 ∈ V | |
| 3 | xpexg 4835 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 × 𝐵) ∈ V) | |
| 4 | 1, 2, 3 | mp2an 426 | 1 ⊢ (𝐴 × 𝐵) ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 Vcvv 2799 × cxp 4718 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-un 4525 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-opab 4146 df-xp 4726 |
| This theorem is referenced by: oprabex 6282 oprabex3 6283 mpoexw 6370 fnpm 6816 mapsnf1o2 6856 xpsnen 6993 endisj 6996 xpcomen 6999 xpassen 7002 xpmapenlem 7023 0ct 7290 exmidomni 7325 exmidfodomrlemim 7395 2omotaplemst 7460 enqex 7563 nqex 7566 enq0ex 7642 nq0ex 7643 npex 7676 enrex 7940 addvalex 8047 axcnex 8062 addex 9864 mulex 9865 ixxex 10112 fxnn0nninf 10678 inftonninf 10681 shftfval 11353 nninfct 12583 qnumval 12728 qdenval 12729 qnnen 13023 prdsex 13323 metuex 14540 cnfldstr 14543 cnfldle 14552 znval 14621 znle 14622 znbaslemnn 14624 fnpsr 14652 txuni2 14951 txbas 14953 eltx 14954 txcnp 14966 txcnmpt 14968 txrest 14971 txlm 14974 reldvg 15374 |
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