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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 6395 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 3021 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 23 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4883 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2779 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 = ∪ 𝐴 ↔ 𝐵 = ∪ 𝐵)) |
| 6 | 1, 2, 5 | 3anbi123d 1465 | . 2 ⊢ (𝐴 = 𝐵 → ((Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴) ↔ (Ord 𝐵 ∧ 𝐵 ≠ ∅ ∧ 𝐵 = ∪ 𝐵))) |
| 7 | df-lim 6393 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6393 | . 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 2959 ∅c0 4281 ∪ cuni 4872 Ord word 6387 Lim wlim 6389 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-ral 3081 df-v 3456 df-ss 3901 df-uni 4873 df-tr 5219 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-ord 6391 df-lim 6393 |
| This theorem is used by: limuni2 6452 limuni3 7897 tfinds2 7909 dfom2 7913 limomss 7916 nnlim 7925 limom 7927 ssnlim 7931 onfununi 8387 tfr1a 8440 tz7.44lem1 8451 tz7.44-2 8453 tz7.44-3 8454 1ellim 8544 2ellim 8545 oeeulem 8648 limensuc 9211 elom3 9686 r1funlimOLD 9807 r1dmlim 9809 rankxplim2 9934 rankxplim3 9935 rankxpsuc 9936 infxpenlem 10131 alephislim 10201 cflim2 10380 winalim 10819 rankcf 10901 gruina 10942 cutbdaybnd2lim 28240 rdgprc0 36770 dfrdg2 36772 dfrdg4 36930 limsucncmpi 37448 limsucncmp 37449 omlimcl2 44505 onexlimgt 44506 onov0suclim 44537 succlg 44591 dflim5 44592 nlim1NEW 44704 nlim2NEW 44705 nlim3 44706 nlim4 44707 dfsucon 44785 |
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