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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 2765 | . . 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 1570 ∈ wcel 2146 suc csuc 6366 |
| 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 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-v 3459 df-un 3911 df-sn 4592 df-suc 6370 |
| This theorem is used by: sucid 6449 nsuceq0 6450 trsuc 6454 sucssel 6462 ordsuc 7812 onpsssuc 7817 nlimsucg 7840 peano3 7889 tfrlem11 8377 tfrlem13 8379 tz7.44-2 8396 omeulem1 8569 oeordi 8575 oeeulem 8589 dif1enlem 9147 rexdif1en 9148 dif1en 9149 php4 9197 wofib 9510 suc11reg 9591 cantnfle 9643 cantnflt2 9645 cantnfp1lem3 9652 cantnflem1 9661 dfac12lem1 10139 dfac12lem2 10140 ttukeylem3 10506 ttukeylem7 10510 r1wunlim 10733 noresle 27890 nosupprefixmo 27893 noinfprefixmo 27894 fmla 35886 ex-sategoelelomsuc 35931 ontgval 36975 sucneqond 38044 finxpreclem4 38073 finxpsuclem 38076 dfsuccl4 39156 suceldisj 39500 onexgt 44000 onepsuc 44012 ordnexbtwnsuc 44027 nlimsuc 44200 sucomisnotcard 44303 |
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