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Theorem preuniqval 39245
Description: Uniqueness/canonicity of pre. presucmap 39244 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 39244 . . . 4 (𝑁 ∈ ran SucMap → pre 𝑁 SucMap 𝑁)
2 preex 39241 . . . . . 6 pre 𝑁 ∈ V
3 sucmapleftuniq 39239 . . . . . 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 38978 . . . 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 2767 . . 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 2145  Vcvv 3450   class class class wbr 5103  ran crn 5656   SucMap csucmap 38927   pre cpre 38929
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-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-sep 5251  ax-nul 5263  ax-pr 5398  ax-un 7737  ax-reg 9565
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 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-eprel 5555  df-fr 5608  df-xp 5661  df-cnv 5663  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-pred 6299  df-suc 6363  df-iota 6489  df-sucmap 39211  df-pre 39224
This theorem is used by: (None)
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