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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 6313 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 2990 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 22 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4867 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2747 | . . 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 6311 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6311 | . 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 2928 ∅c0 4280 ∪ cuni 4856 Ord word 6305 Lim wlim 6307 |
| 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 2113 ax-9 2121 ax-ext 2703 |
| 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 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-ral 3048 df-v 3438 df-ss 3914 df-uni 4857 df-tr 5197 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-ord 6309 df-lim 6311 |
| This theorem is referenced by: limuni2 6369 limuni3 7782 tfinds2 7794 dfom2 7798 limomss 7801 nnlim 7810 limom 7812 ssnlim 7816 onfununi 8261 tfr1a 8313 tz7.44lem1 8324 tz7.44-2 8326 tz7.44-3 8327 1ellim 8413 2ellim 8414 oeeulem 8516 limensuc 9067 elom3 9538 r1funlim 9659 rankxplim2 9773 rankxplim3 9774 rankxpsuc 9775 infxpenlem 9904 alephislim 9974 cflim2 10154 winalim 10586 rankcf 10668 gruina 10709 scutbdaybnd2lim 27758 rdgprc0 35835 dfrdg2 35837 dfrdg4 35993 limsucncmpi 36487 limsucncmp 36488 omlimcl2 43283 onexlimgt 43284 onov0suclim 43315 succlg 43369 dflim5 43370 nlim1NEW 43483 nlim2NEW 43484 nlim3 43485 nlim4 43486 dfsucon 43564 |
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