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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 6369 | . . 3 ⊢ (𝐴 = 𝐵 → (Ord 𝐴 ↔ Ord 𝐵)) | |
| 2 | neeq1 3018 | . . 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 2777 | . . 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 6367 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ 𝐴 ≠ ∅ ∧ 𝐴 = ∪ 𝐴)) | |
| 8 | df-lim 6367 | . 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 2956 ∅c0 4279 ∪ cuni 4867 Ord word 6361 Lim wlim 6363 |
| 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 2733 |
| 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 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3078 df-v 3453 df-ss 3916 df-uni 4868 df-tr 5213 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6365 df-lim 6367 |
| This theorem is used by: limuni2 6426 limuni3 7863 tfinds2 7875 dfom2 7879 limomss 7882 nnlim 7891 limom 7893 ssnlim 7897 onfununi 8349 tfr1a 8402 tz7.44lem1 8413 tz7.44-2 8415 tz7.44-3 8416 1ellim 8506 2ellim 8507 oeeulem 8610 limensuc 9173 elom3 9649 r1funlimOLD 9770 r1dmlim 9772 rankxplim2 9897 rankxplim3 9898 rankxpsuc 9899 infxpenlem 10092 alephislim 10162 cflim2 10341 winalim 10780 rankcf 10862 gruina 10903 cutbdaybnd2lim 28183 rdgprc0 36555 dfrdg2 36557 dfrdg4 36715 limsucncmpi 37233 limsucncmp 37234 omlimcl2 44243 onexlimgt 44244 onov0suclim 44275 succlg 44329 dflim5 44330 nlim1NEW 44442 nlim2NEW 44443 nlim3 44444 nlim4 44445 dfsucon 44523 |
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