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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 6371 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 3022 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 23 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4885 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2781 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 = ∪ 𝐴 ↔ 𝐵 = ∪ 𝐵)) |
| 6 | 1, 2, 5 | 3anbi123d 1464 | . 2 ⊢ (𝐴 = 𝐵 → ((Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴) ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵))) |
| 7 | df-lim 6369 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6369 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ w3a 1103 = wceq 1570 ≠ wne 2960 ∅c0 4286 ∪ cuni 4874 Ord word 6363 Lim wlim 6365 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-v 3459 df-ss 3923 df-uni 4875 df-tr 5221 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6367 df-lim 6369 |
| This theorem is used by: limuni2 6428 limuni3 7854 tfinds2 7866 dfom2 7870 limomss 7873 nnlim 7882 limom 7884 ssnlim 7888 onfununi 8334 tfr1a 8387 tz7.44lem1 8398 tz7.44-2 8400 tz7.44-3 8401 1ellim 8489 2ellim 8490 oeeulem 8593 limensuc 9149 elom3 9624 r1funlim 9745 rankxplim2 9859 rankxplim3 9860 rankxpsuc 9861 infxpenlem 10013 alephislim 10083 cflim2 10262 winalim 10695 rankcf 10777 gruina 10818 cutbdaybnd2lim 28041 rdgprc0 36320 dfrdg2 36322 dfrdg4 36480 limsucncmpi 37013 limsucncmp 37014 omlimcl2 44027 onexlimgt 44028 onov0suclim 44059 succlg 44113 dflim5 44114 nlim1NEW 44226 nlim2NEW 44227 nlim3 44228 nlim4 44229 dfsucon 44307 |
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