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Mirrors > Home > MPE Home > Th. List > phpeqdOLD | Structured version Visualization version GIF version |
Description: Obsolete version of phpeqd 9242 as of 28-Nov-2024. (Contributed by Rohan Ridenour, 3-Aug-2023.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
phpeqdOLD.1 | ⊢ (𝜑 → 𝐴 ∈ Fin) |
phpeqdOLD.2 | ⊢ (𝜑 → 𝐵 ⊆ 𝐴) |
phpeqdOLD.3 | ⊢ (𝜑 → 𝐴 ≈ 𝐵) |
Ref | Expression |
---|---|
phpeqdOLD | ⊢ (𝜑 → 𝐴 = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | phpeqdOLD.3 | . 2 ⊢ (𝜑 → 𝐴 ≈ 𝐵) | |
2 | phpeqdOLD.1 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
3 | phpeqdOLD.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ⊆ 𝐴) | |
4 | 3 | adantr 479 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → 𝐵 ⊆ 𝐴) |
5 | simpr 483 | . . . . . . 7 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐴 = 𝐵) | |
6 | 5 | neqcomd 2736 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐵 = 𝐴) |
7 | dfpss2 4081 | . . . . . 6 ⊢ (𝐵 ⊊ 𝐴 ↔ (𝐵 ⊆ 𝐴 ∧ ¬ 𝐵 = 𝐴)) | |
8 | 4, 6, 7 | sylanbrc 581 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → 𝐵 ⊊ 𝐴) |
9 | php3 9239 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ⊊ 𝐴) → 𝐵 ≺ 𝐴) | |
10 | 2, 8, 9 | syl2an2r 683 | . . . 4 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → 𝐵 ≺ 𝐴) |
11 | sdomnen 9004 | . . . . 5 ⊢ (𝐵 ≺ 𝐴 → ¬ 𝐵 ≈ 𝐴) | |
12 | ensym 9026 | . . . . 5 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
13 | 11, 12 | nsyl 140 | . . . 4 ⊢ (𝐵 ≺ 𝐴 → ¬ 𝐴 ≈ 𝐵) |
14 | 10, 13 | syl 17 | . . 3 ⊢ ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐴 ≈ 𝐵) |
15 | 14 | ex 411 | . 2 ⊢ (𝜑 → (¬ 𝐴 = 𝐵 → ¬ 𝐴 ≈ 𝐵)) |
16 | 1, 15 | mt4d 117 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 = wceq 1534 ∈ wcel 2099 ⊆ wss 3946 ⊊ wpss 3947 class class class wbr 5145 ≈ cen 8963 ≺ csdm 8965 Fincfn 8966 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2697 ax-sep 5296 ax-nul 5303 ax-pow 5361 ax-pr 5425 ax-un 7738 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2704 df-cleq 2718 df-clel 2803 df-nfc 2878 df-ne 2931 df-ral 3052 df-rex 3061 df-reu 3365 df-rab 3420 df-v 3464 df-sbc 3776 df-csb 3892 df-dif 3949 df-un 3951 df-in 3953 df-ss 3963 df-pss 3966 df-nul 4323 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4906 df-br 5146 df-opab 5208 df-mpt 5229 df-tr 5263 df-id 5572 df-eprel 5578 df-po 5586 df-so 5587 df-fr 5629 df-we 5631 df-xp 5680 df-rel 5681 df-cnv 5682 df-co 5683 df-dm 5684 df-rn 5685 df-res 5686 df-ima 5687 df-ord 6371 df-on 6372 df-lim 6373 df-suc 6374 df-iota 6498 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-om 7869 df-1o 8488 df-er 8726 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 |
This theorem is referenced by: (None) |
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