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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 6342 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 2988 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 22 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4885 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2746 | . . 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 6340 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6340 | . 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 1540 ≠ wne 2926 ∅c0 4299 ∪ cuni 4874 Ord word 6334 Lim wlim 6336 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2702 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-3an 1088 df-tru 1543 df-ex 1780 df-sb 2066 df-clab 2709 df-cleq 2722 df-clel 2804 df-ne 2927 df-ral 3046 df-v 3452 df-ss 3934 df-uni 4875 df-tr 5218 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-ord 6338 df-lim 6340 |
| This theorem is referenced by: limuni2 6398 limuni3 7831 tfinds2 7843 dfom2 7847 limomss 7850 nnlim 7859 limom 7861 ssnlim 7865 onfununi 8313 tfr1a 8365 tz7.44lem1 8376 tz7.44-2 8378 tz7.44-3 8379 1ellim 8465 2ellim 8466 oeeulem 8568 limensuc 9124 elom3 9608 r1funlim 9726 rankxplim2 9840 rankxplim3 9841 rankxpsuc 9842 infxpenlem 9973 alephislim 10043 cflim2 10223 winalim 10655 rankcf 10737 gruina 10778 scutbdaybnd2lim 27736 rdgprc0 35788 dfrdg2 35790 dfrdg4 35946 limsucncmpi 36440 limsucncmp 36441 omlimcl2 43238 onexlimgt 43239 onov0suclim 43270 succlg 43324 dflim5 43325 nlim1NEW 43438 nlim2NEW 43439 nlim3 43440 nlim4 43441 dfsucon 43519 |
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