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Mirrors > Home > MPE Home > Th. List > alral | Structured version Visualization version GIF version |
Description: Universal quantification implies restricted quantification. (Contributed by NM, 20-Oct-2006.) |
Ref | Expression |
---|---|
alral | ⊢ (∀𝑥𝜑 → ∀𝑥 ∈ 𝐴 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ala1 1755 | . 2 ⊢ (∀𝑥𝜑 → ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
2 | df-ral 2901 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
3 | 1, 2 | sylibr 223 | 1 ⊢ (∀𝑥𝜑 → ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∀wal 1473 ∈ wcel 1977 ∀wral 2896 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 |
This theorem depends on definitions: df-bi 196 df-ral 2901 |
This theorem is referenced by: find 6983 brdom5 9232 brdom4 9233 prodeq2w 14481 rpnnen2lem12 14793 elpotr 30930 phpreu 32563 neik0pk1imk0 37365 ordelordALTVD 38125 rexrsb 39818 |
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