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Mathbox for Jonathan Ben-Naim |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > bnj937 | Structured version Visualization version GIF version |
Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.) |
Ref | Expression |
---|---|
bnj937.1 | ⊢ (𝜑 → ∃𝑥𝜓) |
Ref | Expression |
---|---|
bnj937 | ⊢ (𝜑 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnj937.1 | . 2 ⊢ (𝜑 → ∃𝑥𝜓) | |
2 | 19.9v 1988 | . 2 ⊢ (∃𝑥𝜓 ↔ 𝜓) | |
3 | 1, 2 | sylib 221 | 1 ⊢ (𝜑 → 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∃wex 1781 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 |
This theorem depends on definitions: df-bi 210 df-ex 1782 |
This theorem is referenced by: bnj1265 32194 bnj1379 32212 bnj852 32303 bnj1148 32378 bnj1154 32381 bnj1189 32391 bnj1245 32396 bnj1286 32401 bnj1311 32406 bnj1371 32411 bnj1374 32413 bnj1498 32443 bnj1514 32445 |
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