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Theorem sucpre 39429
Description: suc is a right-inverse of pre on Suc. This theorem states the partial inverse relation in the direction we most often need. (Contributed by Peter Mazsa, 27-Jan-2026.)
Assertion
Ref Expression
sucpre (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁)

Proof of Theorem sucpre
StepHypRef Expression
1 presucmap 39427 . . 3 (𝑁 ∈ ran SucMap → pre 𝑁 SucMap 𝑁)
2 preex 39424 . . . 4 pre 𝑁 ∈ V
3 brsucmap 39398 . . . 4 (( pre 𝑁 ∈ V ∧ 𝑁 ∈ ran SucMap ) → ( pre 𝑁 SucMap 𝑁 ↔ suc pre 𝑁 = 𝑁))
42, 3mpan 703 . . 3 (𝑁 ∈ ran SucMap → ( pre 𝑁 SucMap 𝑁 ↔ suc pre 𝑁 = 𝑁))
51, 4mpbid 235 . 2 (𝑁 ∈ ran SucMap → suc pre 𝑁 = 𝑁)
6 df-succl 39401 . 2 Suc = ran SucMap
75, 6eleq2s 2879 1 (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   = wceq 1570   ∈ wcel 2145  Vcvv 3451   class class class wbr 5103  ran crn 5652  suc csuc 6364   SucMap csucmap 39110   Suc csuccl 39111   pre cpre 39112
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 2733  ax-sep 5249  ax-nul 5260  ax-pr 5391  ax-un 7751  ax-reg 9586
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 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  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 5551  df-fr 5604  df-xp 5657  df-cnv 5659  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6304  df-suc 6368  df-iota 6494  df-sucmap 39394  df-succl 39401  df-pre 39407
This theorem is used by:  presuc  39430  press  39431  preel  39432
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