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Mirrors > Home > MPE Home > Th. List > elrabd | Structured version Visualization version GIF version |
Description: Membership in a restricted class abstraction, using implicit substitution. Deduction version of elrab 3617. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
Ref | Expression |
---|---|
elrabd.1 | ⊢ (𝑥 = 𝐴 → (𝜓 ↔ 𝜒)) |
elrabd.2 | ⊢ (𝜑 → 𝐴 ∈ 𝐵) |
elrabd.3 | ⊢ (𝜑 → 𝜒) |
Ref | Expression |
---|---|
elrabd | ⊢ (𝜑 → 𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜓}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elrabd.2 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐵) | |
2 | elrabd.3 | . 2 ⊢ (𝜑 → 𝜒) | |
3 | elrabd.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜓 ↔ 𝜒)) | |
4 | 3 | elrab 3617 | . 2 ⊢ (𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜓} ↔ (𝐴 ∈ 𝐵 ∧ 𝜒)) |
5 | 1, 2, 4 | sylanbrc 582 | 1 ⊢ (𝜑 → 𝐴 ∈ {𝑥 ∈ 𝐵 ∣ 𝜓}) |
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