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| Mirrors > Home > ILE Home > Th. List > riotaexg | GIF version | ||
| Description: Restricted iota is a set. (Contributed by Jim Kingdon, 15-Jun-2020.) |
| Ref | Expression |
|---|---|
| riotaexg | ⊢ (𝐴 ∈ 𝑉 → (℩𝑥 ∈ 𝐴 𝜓) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-riota 6011 | . 2 ⊢ (℩𝑥 ∈ 𝐴 𝜓) = (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) | |
| 2 | uniexg 4565 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ∪ 𝐴 ∈ V) | |
| 3 | iotass 5335 | . . . . 5 ⊢ (∀𝑥((𝑥 ∈ 𝐴 ∧ 𝜓) → 𝑥 ⊆ ∪ 𝐴) → (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) ⊆ ∪ 𝐴) | |
| 4 | elssuni 3947 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 → 𝑥 ⊆ ∪ 𝐴) | |
| 5 | 4 | adantr 276 | . . . . 5 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝜓) → 𝑥 ⊆ ∪ 𝐴) |
| 6 | 3, 5 | mpg 1500 | . . . 4 ⊢ (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) ⊆ ∪ 𝐴 |
| 7 | 6 | a1i 9 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) ⊆ ∪ 𝐴) |
| 8 | 2, 7 | ssexd 4255 | . 2 ⊢ (𝐴 ∈ 𝑉 → (℩𝑥(𝑥 ∈ 𝐴 ∧ 𝜓)) ∈ V) |
| 9 | 1, 8 | eqeltrid 2321 | 1 ⊢ (𝐴 ∈ 𝑉 → (℩𝑥 ∈ 𝐴 𝜓) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2205 Vcvv 2815 ⊆ wss 3214 ∪ cuni 3919 ℩cio 5315 ℩crio 6010 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-un 4559 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-uni 3920 df-iota 5317 df-riota 6011 |
| This theorem is referenced by: iotaexel 6016 flval 10656 sqrtrval 11710 qnumval 12907 qdenval 12908 grpidvalg 13636 fn0g 13638 grpinvval 13798 grpinvfng 13799 usgredg2v 16345 |
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