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| Mirrors > Home > MPE Home > Th. List > ralxp | Structured version Visualization version GIF version | ||
| Description: Universal quantification restricted to a Cartesian product is equivalent to a double restricted quantification. The hypothesis specifies an implicit substitution. (Contributed by NM, 7-Feb-2004.) (Revised by Mario Carneiro, 29-Dec-2014.) |
| Ref | Expression |
|---|---|
| ralxp.1 | ⊢ (𝑥 = 〈𝑦, 𝑧〉 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| ralxp | ⊢ (∀𝑥 ∈ (𝐴 × 𝐵)𝜑 ↔ ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐵 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iunxpconst 5723 | . . 3 ⊢ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵) = (𝐴 × 𝐵) | |
| 2 | 1 | raleqi 3317 | . 2 ⊢ (∀𝑥 ∈ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵)𝜑 ↔ ∀𝑥 ∈ (𝐴 × 𝐵)𝜑) |
| 3 | ralxp.1 | . . 3 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → (𝜑 ↔ 𝜓)) | |
| 4 | 3 | raliunxp 5815 | . 2 ⊢ (∀𝑥 ∈ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵)𝜑 ↔ ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐵 𝜓) |
| 5 | 2, 4 | bitr3i 280 | 1 ⊢ (∀𝑥 ∈ (𝐴 × 𝐵)𝜑 ↔ ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐵 𝜓) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1569 ∀wral 3076 {csn 4584 〈cop 4834 ∪ ciun 4950 × cxp 5648 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-iun 4952 df-opab 5167 df-xp 5656 df-rel 5657 |
| This theorem is used by: ralxpf 5823 reu3op 6295 f1opr 7477 ffnov 7547 eqfnov 7550 ovn0ssdmfun 7590 funimassov 7599 f1stres 8026 f2ndres 8027 naddf 8695 ecopover 8846 xpf1o 9162 xpwdomg 9583 rankxplim 9900 imasaddfnlem 17706 imasvscafn 17715 comfeq 17886 isssc 18001 isfuncd 18046 cofucl 18069 funcres2b 18078 evlfcl 18402 uncfcurf 18419 yonedalem3 18460 yonedainv 18461 efgval2 19944 srgfcl 20428 txbas 23892 hausdiag 23970 tx1stc 23975 txkgen 23977 xkococn 23985 cnmpt21 23996 xkoinjcn 24012 tmdcn2 24414 clssubg 24434 qustgplem 24446 txmetcnp 24872 txmetcn 24873 qtopbaslem 25083 bndth 25285 cxpcn3 27082 mpodvdsmulf1o 27527 fsumdvdsmul 27528 dvdsmulf1o 27529 addsf 28374 xrofsup 33406 txpconn 36084 cvmlift2lem1 36154 cvmlift2lem12 36166 mclsax 36421 ismtyhmeolem 38832 dih1dimatlem 42480 ffnaov 48363 plusfreseq 49355 funcf2lem 50289 imaidfu 50320 imasubc 50361 imassc 50363 fucofulem2 50527 |
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