| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4836 | . 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 2800 × cxp 4719 |
| 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 4203 ax-pow 4260 ax-pr 4295 ax-un 4526 |
| 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 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3890 df-opab 4147 df-xp 4727 |
| This theorem is referenced by: oprabex 6283 oprabex3 6284 mpoexw 6371 fnpm 6818 mapsnf1o2 6858 xpsnen 6998 endisj 7001 xpcomen 7004 xpassen 7007 xpmapenlem 7028 0ct 7295 exmidomni 7330 exmidfodomrlemim 7400 2omotaplemst 7465 enqex 7568 nqex 7571 enq0ex 7647 nq0ex 7648 npex 7681 enrex 7945 addvalex 8052 axcnex 8067 addex 9874 mulex 9875 ixxex 10122 fxnn0nninf 10689 inftonninf 10692 shftfval 11369 nninfct 12599 qnumval 12744 qdenval 12745 qnnen 13039 prdsex 13339 metuex 14556 cnfldstr 14559 cnfldle 14568 znval 14637 znle 14638 znbaslemnn 14640 fnpsr 14668 txuni2 14967 txbas 14969 eltx 14970 txcnp 14982 txcnmpt 14984 txrest 14987 txlm 14990 reldvg 15390 |
| Copyright terms: Public domain | W3C validator |