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Theorem preuniqval 39205
Description: Uniqueness/canonicity of pre. presucmap 39204 gives one witness; this theorem gives it is the only one. It turns any predecessor proof into an equality with pre 𝑁. (Contributed by Peter Mazsa, 12-Jan-2026.)
Assertion
Ref Expression
preuniqval (𝑁 ∈ ran SucMap → ∀𝑚(𝑚 SucMap 𝑁𝑚 = pre 𝑁))
Distinct variable group:   𝑚,𝑁

Proof of Theorem preuniqval
StepHypRef Expression
1 presucmap 39204 . . . 4 (𝑁 ∈ ran SucMap → pre 𝑁 SucMap 𝑁)
2 preex 39201 . . . . . 6 pre 𝑁 ∈ V
3 sucmapleftuniq 39199 . . . . . 6 (( pre 𝑁 ∈ V ∧ 𝑚 ∈ V ∧ 𝑁 ∈ ran SucMap ) → (( pre 𝑁 SucMap 𝑁𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
42, 3mp3an1 1477 . . . . 5 ((𝑚 ∈ V ∧ 𝑁 ∈ ran SucMap ) → (( pre 𝑁 SucMap 𝑁𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
54el2v1 38938 . . . 4 (𝑁 ∈ ran SucMap → (( pre 𝑁 SucMap 𝑁𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
61, 5mpand 708 . . 3 (𝑁 ∈ ran SucMap → (𝑚 SucMap 𝑁 → pre 𝑁 = 𝑚))
7 eqcom 2772 . . 3 ( pre 𝑁 = 𝑚𝑚 = pre 𝑁)
86, 7imbitrdi 254 . 2 (𝑁 ∈ ran SucMap → (𝑚 SucMap 𝑁𝑚 = pre 𝑁))
98alrimiv 1960 1 (𝑁 ∈ ran SucMap → ∀𝑚(𝑚 SucMap 𝑁𝑚 = pre 𝑁))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401  wal 1568   = wceq 1570  wcel 2146  Vcvv 3457   class class class wbr 5111  ran crn 5664   SucMap csucmap 38887   pre cpre 38889
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 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-sep 5259  ax-nul 5271  ax-pr 5406  ax-un 7742  ax-reg 9561
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4875  df-br 5112  df-opab 5176  df-eprel 5563  df-fr 5616  df-xp 5669  df-cnv 5671  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6306  df-suc 6370  df-iota 6496  df-sucmap 39171  df-pre 39184
This theorem is used by: (None)
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