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Theorem rr-phpd 40916
Description: Equivalent of php 8685 without negation. (Contributed by Rohan Ridenour, 3-Aug-2023.)
Hypotheses
Ref Expression
rr-phpd.1 (𝜑𝐴 ∈ ω)
rr-phpd.2 (𝜑𝐵𝐴)
rr-phpd.3 (𝜑𝐴𝐵)
Assertion
Ref Expression
rr-phpd (𝜑𝐴 = 𝐵)

Proof of Theorem rr-phpd
StepHypRef Expression
1 rr-phpd.3 . 2 (𝜑𝐴𝐵)
2 rr-phpd.1 . . . 4 (𝜑𝐴 ∈ ω)
3 rr-phpd.2 . . . . . 6 (𝜑𝐵𝐴)
43adantr 484 . . . . 5 ((𝜑 ∧ ¬ 𝐴 = 𝐵) → 𝐵𝐴)
5 simpr 488 . . . . . 6 ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐴 = 𝐵)
65neqcomd 2808 . . . . 5 ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐵 = 𝐴)
7 dfpss2 4013 . . . . 5 (𝐵𝐴 ↔ (𝐵𝐴 ∧ ¬ 𝐵 = 𝐴))
84, 6, 7sylanbrc 586 . . . 4 ((𝜑 ∧ ¬ 𝐴 = 𝐵) → 𝐵𝐴)
9 php 8685 . . . 4 ((𝐴 ∈ ω ∧ 𝐵𝐴) → ¬ 𝐴𝐵)
102, 8, 9syl2an2r 684 . . 3 ((𝜑 ∧ ¬ 𝐴 = 𝐵) → ¬ 𝐴𝐵)
1110ex 416 . 2 (𝜑 → (¬ 𝐴 = 𝐵 → ¬ 𝐴𝐵))
121, 11mt4d 117 1 (𝜑𝐴 = 𝐵)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 399   = wceq 1538  wcel 2111  wss 3881  wpss 3882   class class class wbr 5030  ωcom 7560  cen 8489
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-br 5031  df-opab 5093  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-om 7561  df-er 8272  df-en 8493  df-dom 8494
This theorem is referenced by: (None)
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