| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: The intersection of a non-empty restricted class abstraction exists. |
| Ref | Expression |
|---|---|
| intexrab | ⊢ (∃x ∈ A φ ↔ ∩{x ∈ A∣φ} ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | intexab 1987 | . 2 ⊢ (∃x(x ∈ A ∧ φ) ↔ ∩{x∣(x ∈ A ∧ φ)} ∈ V) | |
| 2 | df-rex 1206 | . 2 ⊢ (∃x ∈ A φ ↔ ∃x(x ∈ A ∧ φ)) | |
| 3 | df-rab 1208 | . . . 4 ⊢ {x ∈ A∣φ} = {x∣(x ∈ A ∧ φ)} | |
| 4 | 3 | inteqi 1969 | . . 3 ⊢ ∩{x ∈ A∣φ} = ∩{x∣(x ∈ A ∧ φ)} |
| 5 | 4 | eleq1i 1152 | . 2 ⊢ (∩{x ∈ A∣φ} ∈ V ↔ ∩{x∣(x ∈ A ∧ φ)} ∈ V) |
| 6 | 1, 2, 5 | 3bitr4 158 | 1 ⊢ (∃x ∈ A φ ↔ ∩{x ∈ A∣φ} ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 127 ∧ wa 196 ∃wex 678 {cab 1090 ∈ wcel 1092 ∃wrex 1202 {crab 1204 Vcvv 1348 ∩cint 1965 |
| This theorem is referenced by: onintrab2 2269 cardval 3633 alephsuc 3672 spanvalt 5300 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-rab 1208 df-v 1349 df-dif 1489 df-in 1491 df-ss 1492 df-nul 1708 df-int 1966 |