| Mathbox for Peter Mazsa |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > sucpre | Structured version Visualization version GIF version | ||
| 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.) |
| Ref | Expression |
|---|---|
| sucpre | ⊢ (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | presucmap 38862 | . . 3 ⊢ (𝑁 ∈ ran SucMap → pre 𝑁 SucMap 𝑁) | |
| 2 | preex 38859 | . . . 4 ⊢ pre 𝑁 ∈ V | |
| 3 | brsucmap 38833 | . . . 4 ⊢ (( pre 𝑁 ∈ V ∧ 𝑁 ∈ ran SucMap ) → ( pre 𝑁 SucMap 𝑁 ↔ suc pre 𝑁 = 𝑁)) | |
| 4 | 2, 3 | mpan 696 | . . 3 ⊢ (𝑁 ∈ ran SucMap → ( pre 𝑁 SucMap 𝑁 ↔ suc pre 𝑁 = 𝑁)) |
| 5 | 1, 4 | mpbid 233 | . 2 ⊢ (𝑁 ∈ ran SucMap → suc pre 𝑁 = 𝑁) |
| 6 | df-succl 38836 | . 2 ⊢ Suc = ran SucMap | |
| 7 | 5, 6 | eleq2s 2857 | 1 ⊢ (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 = wceq 1547 ∈ wcel 2119 Vcvv 3431 class class class wbr 5072 ran crn 5619 suc csuc 6312 SucMap csucmap 38545 Suc csuccl 38546 pre cpre 38547 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pr 5362 ax-un 7678 ax-reg 9497 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-eprel 5518 df-fr 5571 df-xp 5624 df-cnv 5626 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-suc 6316 df-iota 6441 df-sucmap 38829 df-succl 38836 df-pre 38842 |
| This theorem is referenced by: presuc 38865 press 38866 preel 38867 |
| Copyright terms: Public domain | W3C validator |