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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 6364 | . . 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 4878 | . . . 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 6362 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6362 | . 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 2955 ∅c0 4279 ∪ cuni 4867 Ord word 6356 Lim wlim 6358 |
| 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 2147 ax-9 2155 ax-ext 2732 |
| 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 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-v 3452 df-ss 3916 df-uni 4868 df-tr 5213 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-ord 6360 df-lim 6362 |
| This theorem is used by: limuni2 6421 limuni3 7849 tfinds2 7861 dfom2 7865 limomss 7868 nnlim 7877 limom 7879 ssnlim 7883 onfununi 8331 tfr1a 8384 tz7.44lem1 8395 tz7.44-2 8397 tz7.44-3 8398 1ellim 8486 2ellim 8487 oeeulem 8590 limensuc 9153 elom3 9628 r1funlim 9749 rankxplim2 9863 rankxplim3 9864 rankxpsuc 9865 infxpenlem 10017 alephislim 10087 cflim2 10266 winalim 10705 rankcf 10787 gruina 10828 cutbdaybnd2lim 28063 rdgprc0 36371 dfrdg2 36373 dfrdg4 36531 limsucncmpi 37065 limsucncmp 37066 omlimcl2 44084 onexlimgt 44085 onov0suclim 44116 succlg 44170 dflim5 44171 nlim1NEW 44283 nlim2NEW 44284 nlim3 44285 nlim4 44286 dfsucon 44364 |
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