| 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 4842 | . 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 2201 Vcvv 2801 × cxp 4725 |
| 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 2203 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pow 4266 ax-pr 4301 ax-un 4532 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-rex 2515 df-v 2803 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-opab 4152 df-xp 4733 |
| This theorem is referenced by: oprabex 6295 oprabex3 6296 mpoexw 6383 fnpm 6830 mapsnf1o2 6870 xpsnen 7010 endisj 7013 xpcomen 7016 xpassen 7019 xpmapenlem 7040 0ct 7311 exmidomni 7346 exmidfodomrlemim 7417 2omotaplemst 7482 enqex 7585 nqex 7588 enq0ex 7664 nq0ex 7665 npex 7698 enrex 7962 addvalex 8069 axcnex 8084 addex 9891 mulex 9892 ixxex 10139 fxnn0nninf 10707 inftonninf 10710 shftfval 11404 nninfct 12635 qnumval 12780 qdenval 12781 qnnen 13075 prdsex 13375 metuex 14593 cnfldstr 14596 cnfldle 14605 znval 14674 znle 14675 znbaslemnn 14677 fnpsr 14705 txuni2 15009 txbas 15011 eltx 15012 txcnp 15024 txcnmpt 15026 txrest 15029 txlm 15032 reldvg 15432 |
| Copyright terms: Public domain | W3C validator |