| 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 6440 | . 2 ⊢ pre 𝑁 ⊆ suc pre 𝑁 | |
| 2 | sucpre 39246 | . 2 ⊢ (𝑁 ∈ Suc → suc pre 𝑁 = 𝑁) | |
| 3 | 1, 2 | sseqtrid 3973 | 1 ⊢ (𝑁 ∈ Suc → pre 𝑁 ⊆ 𝑁) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 ⊆ wss 3899 suc csuc 6359 Suc csuccl 38928 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-succl 39218 df-pre 39224 |
| This theorem is used by: (None) |
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