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Mirrors > Home > MPE Home > Th. List > 19.21bbi | Structured version Visualization version GIF version |
Description: Inference removing double quantifier. Version of 19.21bi 2047 with two quanditiers. (Contributed by NM, 20-Apr-1994.) |
Ref | Expression |
---|---|
19.21bbi.1 | ⊢ (𝜑 → ∀𝑥∀𝑦𝜓) |
Ref | Expression |
---|---|
19.21bbi | ⊢ (𝜑 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.21bbi.1 | . . 3 ⊢ (𝜑 → ∀𝑥∀𝑦𝜓) | |
2 | 1 | 19.21bi 2047 | . 2 ⊢ (𝜑 → ∀𝑦𝜓) |
3 | 2 | 19.21bi 2047 | 1 ⊢ (𝜑 → 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∀wal 1473 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-12 2034 |
This theorem depends on definitions: df-bi 196 df-ex 1696 |
This theorem is referenced by: 2mo 2539 pocl 4966 funun 5846 fununi 5878 trclfvcotr 13598 pm14.24 37655 |
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