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Mirrors > Home > NFE Home > Th. List > ralxp | 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 |
---|---|
raliunxp.1 | ⊢ (x = 〈y, z〉 → (φ ↔ ψ)) |
Ref | Expression |
---|---|
ralxp | ⊢ (∀x ∈ (A × B)φ ↔ ∀y ∈ A ∀z ∈ B ψ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iunxpconst 4820 | . . 3 ⊢ ∪y ∈ A ({y} × B) = (A × B) | |
2 | 1 | raleqi 2812 | . 2 ⊢ (∀x ∈ ∪ y ∈ A ({y} × B)φ ↔ ∀x ∈ (A × B)φ) |
3 | raliunxp.1 | . . 3 ⊢ (x = 〈y, z〉 → (φ ↔ ψ)) | |
4 | 3 | raliunxp 4824 | . 2 ⊢ (∀x ∈ ∪ y ∈ A ({y} × B)φ ↔ ∀y ∈ A ∀z ∈ B ψ) |
5 | 2, 4 | bitr3i 242 | 1 ⊢ (∀x ∈ (A × B)φ ↔ ∀y ∈ A ∀z ∈ B ψ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 176 = wceq 1642 ∀wral 2615 {csn 3738 ∪ciun 3970 〈cop 4562 × cxp 4771 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-13 1712 ax-14 1714 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4079 ax-xp 4080 ax-cnv 4081 ax-1c 4082 ax-sset 4083 ax-si 4084 ax-ins2 4085 ax-ins3 4086 ax-typlower 4087 ax-sn 4088 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3or 935 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-eu 2208 df-mo 2209 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-reu 2622 df-rmo 2623 df-rab 2624 df-v 2862 df-sbc 3048 df-csb 3138 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-symdif 3217 df-ss 3260 df-pss 3262 df-nul 3552 df-if 3664 df-pw 3725 df-sn 3742 df-pr 3743 df-uni 3893 df-int 3928 df-iun 3972 df-opk 4059 df-1c 4137 df-pw1 4138 df-uni1 4139 df-xpk 4186 df-cnvk 4187 df-ins2k 4188 df-ins3k 4189 df-imak 4190 df-cok 4191 df-p6 4192 df-sik 4193 df-ssetk 4194 df-imagek 4195 df-idk 4196 df-iota 4340 df-0c 4378 df-addc 4379 df-nnc 4380 df-fin 4381 df-lefin 4441 df-ltfin 4442 df-ncfin 4443 df-tfin 4444 df-evenfin 4445 df-oddfin 4446 df-sfin 4447 df-spfin 4448 df-phi 4566 df-op 4567 df-proj1 4568 df-proj2 4569 df-opab 4624 df-xp 4785 |
This theorem is referenced by: ralxpf 4828 ffnov 5588 eqfnov 5590 funimassov 5610 fce 6189 |
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