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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 6368 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 3026 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 23 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4887 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2785 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 = ∪ 𝐴 ↔ 𝐵 = ∪ 𝐵)) |
| 6 | 1, 2, 5 | 3anbi123d 1462 | . 2 ⊢ (𝐴 = 𝐵 → ((Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴) ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵))) |
| 7 | df-lim 6366 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6366 | . 2 ⊢ (Lim 𝐵 ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵)) | |
| 9 | 6, 7, 8 | 3bitr4g 317 | 1 ⊢ (𝐴 = 𝐵 → (Lim 𝐴 ↔ Lim 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ w3a 1101 = wceq 1567 ≠ wne 2964 ∅c0 4294 ∪ cuni 4876 Ord word 6360 Lim wlim 6362 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-3an 1103 df-tru 1570 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-v 3465 df-ss 3930 df-uni 4877 df-tr 5223 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-ord 6364 df-lim 6366 |
| This theorem is referenced by: limuni2 6425 limuni3 7847 tfinds2 7859 dfom2 7863 limomss 7866 nnlim 7875 limom 7877 ssnlim 7881 onfununi 8327 tfr1a 8380 tz7.44lem1 8391 tz7.44-2 8393 tz7.44-3 8394 1ellim 8482 2ellim 8483 oeeulem 8586 limensuc 9141 elom3 9616 r1funlim 9737 rankxplim2 9851 rankxplim3 9852 rankxpsuc 9853 infxpenlem 9996 alephislim 10066 cflim2 10246 winalim 10679 rankcf 10761 gruina 10802 cutbdaybnd2lim 27955 rdgprc0 36181 dfrdg2 36183 dfrdg4 36341 limsucncmpi 36844 limsucncmp 36845 omlimcl2 43860 onexlimgt 43861 onov0suclim 43892 succlg 43946 dflim5 43947 nlim1NEW 44059 nlim2NEW 44060 nlim3 44061 nlim4 44062 dfsucon 44140 |
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