| Mathbox for Peter Mazsa |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > press | Structured version Visualization version GIF version | ||
| Description: Predecessor is a subset of its successor. (Contributed by Peter Mazsa, 12-Jan-2026.) |
| Ref | Expression |
|---|---|
| press | ⊢ (𝑁 ∈ Suc → pre 𝑁 ⊆ 𝑁) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sssucid 6443 | . 2 ⊢ pre 𝑁 ⊆ suc pre 𝑁 | |
| 2 | sucpre 39146 | . 2 ⊢ (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁) | |
| 3 | 1, 2 | sseqtrid 3979 | 1 ⊢ (𝑁 ∈ Suc → pre 𝑁 ⊆ 𝑁) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 ⊆ wss 3905 suc csuc 6362 Suc csuccl 38828 pre cpre 38829 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 ax-un 7732 ax-reg 9550 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-eprel 5561 df-fr 5614 df-xp 5667 df-cnv 5669 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-suc 6366 df-iota 6492 df-sucmap 39111 df-succl 39118 df-pre 39124 |
| This theorem is referenced by: (None) |
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