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| Mirrors > Home > MPE Home > Th. List > limeq | Structured version Visualization version GIF version | ||
| Description: Equality theorem for the limit predicate. (Contributed by NM, 22-Apr-1994.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
| Ref | Expression |
|---|---|
| limeq | ⊢ (𝐴 = 𝐵 → (Lim 𝐴 ↔ Lim 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordeq 6322 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 2992 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 22 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4872 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2750 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 = ∪ 𝐴 ↔ 𝐵 = ∪ 𝐵)) |
| 6 | 1, 2, 5 | 3anbi123d 1438 | . 2 ⊢ (𝐴 = 𝐵 → ((Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴) ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵))) |
| 7 | df-lim 6320 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6320 | . 2 ⊢ (Lim 𝐵 ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵)) | |
| 9 | 6, 7, 8 | 3bitr4g 314 | 1 ⊢ (𝐴 = 𝐵 → (Lim 𝐴 ↔ Lim 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ w3a 1086 = wceq 1541 ≠ wne 2930 ∅c0 4283 ∪ cuni 4861 Ord word 6314 Lim wlim 6316 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-3an 1088 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ne 2931 df-ral 3050 df-v 3440 df-ss 3916 df-uni 4862 df-tr 5204 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-ord 6318 df-lim 6320 |
| This theorem is referenced by: limuni2 6378 limuni3 7792 tfinds2 7804 dfom2 7808 limomss 7811 nnlim 7820 limom 7822 ssnlim 7826 onfununi 8271 tfr1a 8323 tz7.44lem1 8334 tz7.44-2 8336 tz7.44-3 8337 1ellim 8423 2ellim 8424 oeeulem 8527 limensuc 9080 elom3 9555 r1funlim 9676 rankxplim2 9790 rankxplim3 9791 rankxpsuc 9792 infxpenlem 9921 alephislim 9991 cflim2 10171 winalim 10604 rankcf 10686 gruina 10727 scutbdaybnd2lim 27785 rdgprc0 35934 dfrdg2 35936 dfrdg4 36094 limsucncmpi 36588 limsucncmp 36589 omlimcl2 43426 onexlimgt 43427 onov0suclim 43458 succlg 43512 dflim5 43513 nlim1NEW 43625 nlim2NEW 43626 nlim3 43627 nlim4 43628 dfsucon 43706 |
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