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| Mirrors > Home > MPE Home > Th. List > sucidg | Structured version Visualization version GIF version | ||
| Description: Part of Proposition 7.23 of [TakeutiZaring] p. 41 (generalized). Lemma 1.7 of [Schloeder] p. 1. (Contributed by NM, 25-Mar-1995.) (Proof shortened by Scott Fenton, 20-Feb-2012.) |
| Ref | Expression |
|---|---|
| sucidg | ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ suc 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2760 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 880 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6435 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ suc 𝐴 ↔ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴))) | |
| 4 | 2, 3 | mpbiri 261 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ suc 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∨ wo 861 = wceq 1569 ∈ wcel 2144 suc csuc 6366 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-un 4150 df-sn 4585 df-suc 6370 |
| This theorem is used by: sucid 6449 nsuceq0 6450 trsuc 6454 sucssel 6462 ordsuc 7827 onpsssuc 7832 nlimsucg 7855 peano3 7904 tfrlem11 8401 tfrlem13 8403 tz7.44-2 8420 omeulem1 8595 oeordi 8601 oeeulem 8615 dif1enlem 9180 rexdif1en 9181 dif1en 9182 php4 9230 wofib 9544 suc11reg 9625 cantnfle 9677 cantnflt2 9679 cantnfp1lem3 9686 cantnflem1 9695 dfac12lem1 10227 dfac12lem2 10228 ttukeylem3 10594 ttukeylem7 10598 r1wunlim 10827 noresle 28061 nosupprefixmo 28064 noinfprefixmo 28065 fmla 36234 ex-sategoelelomsuc 36279 ontgval 37313 sucneqond 38395 finxpreclem4 38424 finxpsuclem 38427 dfsuccl4 39513 suceldisj 39857 onexgt 44349 onepsuc 44361 ordnexbtwnsuc 44376 nlimsuc 44549 sucomisnotcard 44652 |
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