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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 4840 | . 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 2202 Vcvv 2802 × cxp 4723 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-opab 4151 df-xp 4731 |
| This theorem is referenced by: oprabex 6290 oprabex3 6291 mpoexw 6378 fnpm 6825 mapsnf1o2 6865 xpsnen 7005 endisj 7008 xpcomen 7011 xpassen 7014 xpmapenlem 7035 0ct 7306 exmidomni 7341 exmidfodomrlemim 7412 2omotaplemst 7477 enqex 7580 nqex 7583 enq0ex 7659 nq0ex 7660 npex 7693 enrex 7957 addvalex 8064 axcnex 8079 addex 9886 mulex 9887 ixxex 10134 fxnn0nninf 10702 inftonninf 10705 shftfval 11383 nninfct 12614 qnumval 12759 qdenval 12760 qnnen 13054 prdsex 13354 metuex 14572 cnfldstr 14575 cnfldle 14584 znval 14653 znle 14654 znbaslemnn 14656 fnpsr 14684 txuni2 14983 txbas 14985 eltx 14986 txcnp 14998 txcnmpt 15000 txrest 15003 txlm 15006 reldvg 15406 |
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