| Mathbox for Emmett Weisz |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > setis | Structured version Visualization version GIF version | ||
| Description: Version of setrec2 50456 expressed as an induction schema. This theorem is a generalization of tfis3 7855. (Contributed by Emmett Weisz, 27-Feb-2022.) |
| Ref | Expression |
|---|---|
| setis.1 | ⊢ 𝐵 = setrecs(𝐹) |
| setis.2 | ⊢ (𝑏 = 𝐴 → (𝜓 ↔ 𝜒)) |
| setis.3 | ⊢ (𝜑 → ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓)) |
| Ref | Expression |
|---|---|
| setis | ⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝜒)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | setis.1 | . . . 4 ⊢ 𝐵 = setrecs(𝐹) | |
| 2 | setis.3 | . . . . 5 ⊢ (𝜑 → ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓)) | |
| 3 | ssabral 4019 | . . . . . . 7 ⊢ (𝑎 ⊆ {𝑏 ∣ 𝜓} ↔ ∀𝑏 ∈ 𝑎 𝜓) | |
| 4 | ssabral 4019 | . . . . . . 7 ⊢ ((𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓} ↔ ∀𝑏 ∈ (𝐹‘𝑎)𝜓) | |
| 5 | 3, 4 | imbi12i 353 | . . . . . 6 ⊢ ((𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓}) ↔ (∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓)) |
| 6 | 5 | albii 1849 | . . . . 5 ⊢ (∀𝑎(𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓}) ↔ ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓)) |
| 7 | 2, 6 | sylibr 237 | . . . 4 ⊢ (𝜑 → ∀𝑎(𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓})) |
| 8 | 1, 7 | setrec2v 50457 | . . 3 ⊢ (𝜑 → 𝐵 ⊆ {𝑏 ∣ 𝜓}) |
| 9 | 8 | sseld 3937 | . 2 ⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝐴 ∈ {𝑏 ∣ 𝜓})) |
| 10 | setis.2 | . . 3 ⊢ (𝑏 = 𝐴 → (𝜓 ↔ 𝜒)) | |
| 11 | 10 | elabg 3636 | . 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ {𝑏 ∣ 𝜓} ↔ 𝜒)) |
| 12 | 9, 11 | mpbidi 244 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝜒)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∀wal 1568 = wceq 1570 ∈ wcel 2143 {cab 2741 ∀wral 3079 ⊆ wss 3906 ‘cfv 6538 setrecscsetrecs 50444 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6494 df-fun 6540 df-fv 6546 df-setrecs 50445 |
| This theorem is referenced by: pgindnf 50477 |
| Copyright terms: Public domain | W3C validator |