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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 5624 | . . 3 ⊢ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵) = (𝐴 × 𝐵) | |
2 | 1 | raleqi 3413 | . 2 ⊢ (∀𝑥 ∈ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵)𝜑 ↔ ∀𝑥 ∈ (𝐴 × 𝐵)𝜑) |
3 | ralxp.1 | . . 3 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → (𝜑 ↔ 𝜓)) | |
4 | 3 | raliunxp 5710 | . 2 ⊢ (∀𝑥 ∈ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵)𝜑 ↔ ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐵 𝜓) |
5 | 2, 4 | bitr3i 279 | 1 ⊢ (∀𝑥 ∈ (𝐴 × 𝐵)𝜑 ↔ ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐵 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 = wceq 1537 ∀wral 3138 {csn 4567 〈cop 4573 ∪ ciun 4919 × cxp 5553 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-iun 4921 df-opab 5129 df-xp 5561 df-rel 5562 |
This theorem is referenced by: ralxpf 5717 reu3op 6143 f1opr 7210 ffnov 7278 eqfnov 7280 funimassov 7325 f1stres 7713 f2ndres 7714 ecopover 8401 xpf1o 8679 xpwdomg 9049 rankxplim 9308 imasaddfnlem 16801 imasvscafn 16810 comfeq 16976 isssc 17090 isfuncd 17135 cofucl 17158 funcres2b 17167 evlfcl 17472 uncfcurf 17489 yonedalem3 17530 yonedainv 17531 efgval2 18850 srgfcl 19265 txbas 22175 hausdiag 22253 tx1stc 22258 txkgen 22260 xkococn 22268 cnmpt21 22279 xkoinjcn 22295 tmdcn2 22697 clssubg 22717 qustgplem 22729 txmetcnp 23157 txmetcn 23158 qtopbaslem 23367 bndth 23562 cxpcn3 25329 dvdsmulf1o 25771 fsumdvdsmul 25772 xrofsup 30492 txpconn 32479 cvmlift2lem1 32549 cvmlift2lem12 32561 mclsax 32816 ismtyhmeolem 35097 dih1dimatlem 38480 ffnaov 43418 ovn0ssdmfun 44054 plusfreseq 44059 |
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