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Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-issetiv | Structured version Visualization version GIF version |
Description: Version of bj-isseti 32864 with a dv condition on 𝑥, 𝑉. This proof uses only df-ex 1705, ax-gen 1722, ax-4 1737 and df-clel 2618 on top of propositional calculus. Prefer its use over bj-isseti 32864 when sufficient (in particular when 𝑉 is substituted for V). (Contributed by BJ, 14-Sep-2019.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
bj-issetiv.1 | ⊢ 𝐴 ∈ 𝑉 |
Ref | Expression |
---|---|
bj-issetiv | ⊢ ∃𝑥 𝑥 = 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-issetiv.1 | . 2 ⊢ 𝐴 ∈ 𝑉 | |
2 | bj-elissetv 32861 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∃𝑥 𝑥 = 𝐴) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ ∃𝑥 𝑥 = 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1483 ∃wex 1704 ∈ wcel 1990 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 |
This theorem depends on definitions: df-bi 197 df-an 386 df-ex 1705 df-clel 2618 |
This theorem is referenced by: bj-rexcom4bv 32871 bj-vtoclf 32908 |
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