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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 5606 | . . 3 ⊢ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵) = (𝐴 × 𝐵) | |
2 | 1 | raleqi 3313 | . 2 ⊢ (∀𝑥 ∈ ∪ 𝑦 ∈ 𝐴 ({𝑦} × 𝐵)𝜑 ↔ ∀𝑥 ∈ (𝐴 × 𝐵)𝜑) |
3 | ralxp.1 | . . 3 ⊢ (𝑥 = 〈𝑦, 𝑧〉 → (𝜑 ↔ 𝜓)) | |
4 | 3 | raliunxp 5693 | . 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 |
Syntax hints: → wi 4 ↔ wb 209 = wceq 1543 ∀wral 3051 {csn 4527 〈cop 4533 ∪ ciun 4890 × cxp 5534 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-iun 4892 df-opab 5102 df-xp 5542 df-rel 5543 |
This theorem is referenced by: ralxpf 5700 reu3op 6135 f1opr 7245 ffnov 7315 eqfnov 7317 funimassov 7363 f1stres 7763 f2ndres 7764 ecopover 8481 xpf1o 8786 xpwdomg 9179 rankxplim 9460 imasaddfnlem 16987 imasvscafn 16996 comfeq 17163 isssc 17279 isfuncd 17325 cofucl 17348 funcres2b 17357 evlfcl 17684 uncfcurf 17701 yonedalem3 17742 yonedainv 17743 efgval2 19068 srgfcl 19484 txbas 22418 hausdiag 22496 tx1stc 22501 txkgen 22503 xkococn 22511 cnmpt21 22522 xkoinjcn 22538 tmdcn2 22940 clssubg 22960 qustgplem 22972 txmetcnp 23399 txmetcn 23400 qtopbaslem 23610 bndth 23809 cxpcn3 25588 dvdsmulf1o 26030 fsumdvdsmul 26031 xrofsup 30764 txpconn 32861 cvmlift2lem1 32931 cvmlift2lem12 32943 mclsax 33198 ismtyhmeolem 35648 dih1dimatlem 39029 ffnaov 44306 ovn0ssdmfun 44937 plusfreseq 44942 funcf2lem 45915 |
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