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Mirrors > Home > ILE Home > Th. List > rgen2w | GIF version |
Description: Generalization rule for restricted quantification. Note that 𝑥 and 𝑦 needn't be distinct. (Contributed by NM, 18-Jun-2014.) |
Ref | Expression |
---|---|
rgenw.1 | ⊢ 𝜑 |
Ref | Expression |
---|---|
rgen2w | ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rgenw.1 | . . 3 ⊢ 𝜑 | |
2 | 1 | rgenw 2418 | . 2 ⊢ ∀𝑦 ∈ 𝐵 𝜑 |
3 | 2 | rgenw 2418 | 1 ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 |
Colors of variables: wff set class |
Syntax hints: ∀wral 2348 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-gen 1378 |
This theorem depends on definitions: df-bi 115 df-ral 2353 |
This theorem is referenced by: fnmpt2i 5850 ixxf 8921 fzf 9033 rexfiuz 9875 |
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