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Mirrors > Home > MPE Home > Th. List > Mathboxes > elwlimOLD | Structured version Visualization version GIF version |
Description: Membership in the limit class. (Contributed by Scott Fenton, 15-Jun-2018.) Obsolete version of elwlim 31013 as of 10-Oct-2021. (New usage is discouraged.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
elwlimOLD | ⊢ (𝑋 ∈ WLimOLD(𝑅, 𝐴) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neeq1 2844 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝑥 ≠ sup(𝐴, 𝐴, ◡𝑅) ↔ 𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅))) | |
2 | id 22 | . . . . 5 ⊢ (𝑥 = 𝑋 → 𝑥 = 𝑋) | |
3 | predeq3 5601 | . . . . . 6 ⊢ (𝑥 = 𝑋 → Pred(𝑅, 𝐴, 𝑥) = Pred(𝑅, 𝐴, 𝑋)) | |
4 | 3 | supeq1d 8235 | . . . . 5 ⊢ (𝑥 = 𝑋 → sup(Pred(𝑅, 𝐴, 𝑥), 𝐴, 𝑅) = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅)) |
5 | 2, 4 | eqeq12d 2625 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝑥 = sup(Pred(𝑅, 𝐴, 𝑥), 𝐴, 𝑅) ↔ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅))) |
6 | 1, 5 | anbi12d 743 | . . 3 ⊢ (𝑥 = 𝑋 → ((𝑥 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑥 = sup(Pred(𝑅, 𝐴, 𝑥), 𝐴, 𝑅)) ↔ (𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅)))) |
7 | df-wlimOLD 31003 | . . 3 ⊢ WLimOLD(𝑅, 𝐴) = {𝑥 ∈ 𝐴 ∣ (𝑥 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑥 = sup(Pred(𝑅, 𝐴, 𝑥), 𝐴, 𝑅))} | |
8 | 6, 7 | elrab2 3333 | . 2 ⊢ (𝑋 ∈ WLimOLD(𝑅, 𝐴) ↔ (𝑋 ∈ 𝐴 ∧ (𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅)))) |
9 | 3anass 1035 | . 2 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅)) ↔ (𝑋 ∈ 𝐴 ∧ (𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅)))) | |
10 | 8, 9 | bitr4i 266 | 1 ⊢ (𝑋 ∈ WLimOLD(𝑅, 𝐴) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ≠ sup(𝐴, 𝐴, ◡𝑅) ∧ 𝑋 = sup(Pred(𝑅, 𝐴, 𝑋), 𝐴, 𝑅))) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ◡ccnv 5037 Predcpred 5596 supcsup 8229 WLimOLDcwlimOLD 30999 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-xp 5044 df-cnv 5046 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-sup 8231 df-wlimOLD 31003 |
This theorem is referenced by: (None) |
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