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Mirrors > Home > MPE Home > Th. List > ab2rexex2 | Structured version Visualization version GIF version |
Description: Existence of an existentially restricted class abstraction. 𝜑 normally has free-variable parameters 𝑥, 𝑦, and 𝑧. Compare abrexex2 7670. (Contributed by NM, 20-Sep-2011.) |
Ref | Expression |
---|---|
ab2rexex2.1 | ⊢ 𝐴 ∈ V |
ab2rexex2.2 | ⊢ 𝐵 ∈ V |
ab2rexex2.3 | ⊢ {𝑧 ∣ 𝜑} ∈ V |
Ref | Expression |
---|---|
ab2rexex2 | ⊢ {𝑧 ∣ ∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜑} ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ab2rexex2.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | ab2rexex2.2 | . . 3 ⊢ 𝐵 ∈ V | |
3 | ab2rexex2.3 | . . 3 ⊢ {𝑧 ∣ 𝜑} ∈ V | |
4 | 2, 3 | abrexex2 7670 | . 2 ⊢ {𝑧 ∣ ∃𝑦 ∈ 𝐵 𝜑} ∈ V |
5 | 1, 4 | abrexex2 7670 | 1 ⊢ {𝑧 ∣ ∃𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜑} ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 {cab 2799 ∃wrex 3139 Vcvv 3494 |
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-rep 5190 ax-sep 5203 ax-nul 5210 ax-pr 5330 ax-un 7461 |
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-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 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-uni 4839 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 |
This theorem is referenced by: brdom7disj 9953 brdom6disj 9954 lineset 36889 |
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