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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 4866 | . 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 2205 Vcvv 2815 × cxp 4749 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 ax-un 4556 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-rex 2528 df-v 2817 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-opab 4174 df-xp 4757 |
| This theorem is referenced by: oprabex 6323 oprabex3 6324 mpoexw 6411 fnpm 6892 mapsnf1o2 6933 xpsnen 7074 endisj 7077 xpcomen 7080 xpassen 7083 xpmapenlem 7104 0ct 7400 exmidomni 7435 exmidfodomrlemim 7506 2omotaplemst 7577 enqex 7680 nqex 7683 enq0ex 7759 nq0ex 7760 npex 7793 enrex 8057 addvalex 8164 axcnex 8179 addex 9990 mulex 9991 ixxex 10238 fxnn0nninf 10808 inftonninf 10811 shftfval 11514 nninfct 12745 qnumval 12890 qdenval 12891 qnnen 13203 prdsex 13503 metuex 14752 cnfldstr 14755 cnfldle 14764 znval 14833 znle 14834 znbaslemnn 14836 fnpsr 14864 txuni2 15170 txbas 15172 eltx 15173 txcnp 15185 txcnmpt 15187 txrest 15190 txlm 15193 reldvg 15593 pellexlem3 15896 |
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