Theorem preuniqval 38817

Description: Uniqueness/canonicity of pre. presucmap 38816 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 𝑁 → 𝑚 = pre 𝑁))

Distinct variable group:   𝑚,𝑁

Proof of Theorem preuniqval

Step	Hyp	Ref	Expression
1		presucmap 38816	. . . 4 ⊢ (𝑁 ∈ ran SucMap → pre 𝑁 SucMap 𝑁)
2		preex 38813	. . . . . 6 ⊢ pre 𝑁 ∈ V
3		sucmapleftuniq 38811	. . . . . 6 ⊢ (( pre 𝑁 ∈ V ∧ 𝑚 ∈ V ∧ 𝑁 ∈ ran SucMap ) → (( pre 𝑁 SucMap 𝑁 ∧ 𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
4	2, 3	mp3an1 1451	. . . . 5 ⊢ ((𝑚 ∈ V ∧ 𝑁 ∈ ran SucMap ) → (( pre 𝑁 SucMap 𝑁 ∧ 𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
5	4	el2v1 38550	. . . 4 ⊢ (𝑁 ∈ ran SucMap → (( pre 𝑁 SucMap 𝑁 ∧ 𝑚 SucMap 𝑁) → pre 𝑁 = 𝑚))
6	1, 5	mpand 696	. . 3 ⊢ (𝑁 ∈ ran SucMap → (𝑚 SucMap 𝑁 → pre 𝑁 = 𝑚))
7		eqcom 2743	. . 3 ⊢ ( pre 𝑁 = 𝑚 ↔ 𝑚 = pre 𝑁)
8	6, 7	imbitrdi 251	. 2 ⊢ (𝑁 ∈ ran SucMap → (𝑚 SucMap 𝑁 → 𝑚 = pre 𝑁))
9	8	alrimiv 1929	1 ⊢ (𝑁 ∈ ran SucMap → ∀𝑚(𝑚 SucMap 𝑁 → 𝑚 = pre 𝑁))

Syntax hints:   → wi 4   ∧ wa 395  ∀wal 1540   = wceq 1542   ∈ wcel 2114  Vcvv 3429   class class class wbr 5085  ran crn 5632   SucMap csucmap 38499   pre cpre 38501

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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pr 5375  ax-un 7689  ax-reg 9507

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-br 5086  df-opab 5148  df-eprel 5531  df-fr 5584  df-xp 5637  df-cnv 5639  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6265  df-suc 6329  df-iota 6454  df-sucmap 38783  df-pre 38796

This theorem is referenced by: (None)