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Mathbox for Jonathan Ben-Naim |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > bnj101 | 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 |
---|---|
bnj101.1 | ⊢ ∃𝑥𝜑 |
bnj101.2 | ⊢ (𝜑 → 𝜓) |
Ref | Expression |
---|---|
bnj101 | ⊢ ∃𝑥𝜓 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnj101.1 | . 2 ⊢ ∃𝑥𝜑 | |
2 | bnj101.2 | . 2 ⊢ (𝜑 → 𝜓) | |
3 | 1, 2 | eximii 1832 | 1 ⊢ ∃𝑥𝜓 |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∃wex 1774 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 |
This theorem depends on definitions: df-bi 206 df-ex 1775 |
This theorem is referenced by: bnj1023 34625 bnj1098 34628 bnj1101 34629 bnj1109 34631 bnj1468 34691 bnj907 34812 bnj1110 34827 bnj1118 34829 bnj1128 34835 bnj1145 34838 bnj1172 34846 bnj1174 34848 bnj1176 34850 |
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