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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 6372 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 3017 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ≠ ∅ ↔ 𝐵 ≠ ∅)) | |
| 3 | id 23 | . . . 4 ⊢ (𝐴 = 𝐵 → 𝐴 = 𝐵) | |
| 4 | unieq 4877 | . . . 4 ⊢ (𝐴 = 𝐵 → ∪ 𝐴 = ∪ 𝐵) | |
| 5 | 3, 4 | eqeq12d 2776 | . . 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 6370 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6370 | . 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 1569 ≠ wne 2955 ∅c0 4277 ∪ cuni 4866 Ord word 6364 Lim wlim 6366 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-v 3452 df-ss 3897 df-uni 4867 df-tr 5212 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6368 df-lim 6370 |
| This theorem is used by: limuni2 6429 limuni3 7867 tfinds2 7879 dfom2 7883 limomss 7886 nnlim 7895 limom 7897 ssnlim 7901 onfununi 8357 tfr1a 8410 tz7.44lem1 8421 tz7.44-2 8423 tz7.44-3 8424 1ellim 8514 2ellim 8515 oeeulem 8618 limensuc 9181 elom3 9656 r1funlimOLD 9777 r1dmlim 9779 rankxplim2 9904 rankxplim3 9905 rankxpsuc 9906 infxpenlem 10099 alephislim 10169 cflim2 10348 winalim 10787 rankcf 10869 gruina 10910 cutbdaybnd2lim 28192 rdgprc0 36679 dfrdg2 36681 dfrdg4 36839 limsucncmpi 37357 limsucncmp 37358 omlimcl2 44381 onexlimgt 44382 onov0suclim 44413 succlg 44467 dflim5 44468 nlim1NEW 44580 nlim2NEW 44581 nlim3 44582 nlim4 44583 dfsucon 44661 |
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