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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 2737 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 867 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6395 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ suc 𝐴 ↔ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴))) | |
| 4 | 2, 3 | mpbiri 258 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ suc 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ wo 848 = wceq 1542 ∈ wcel 2114 suc csuc 6327 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3444 df-un 3908 df-sn 4583 df-suc 6331 |
| This theorem is referenced by: sucid 6409 nsuceq0 6410 trsuc 6414 sucssel 6422 ordsuc 7766 onpsssuc 7771 nlimsucg 7794 tfrlem11 8329 tfrlem13 8331 tz7.44-2 8348 omeulem1 8519 oeordi 8525 oeeulem 8539 dif1enlem 9096 rexdif1en 9097 dif1en 9098 php4 9146 wofib 9462 suc11reg 9540 cantnfle 9592 cantnflt2 9594 cantnfp1lem3 9601 cantnflem1 9610 dfac12lem1 10066 dfac12lem2 10067 ttukeylem3 10433 ttukeylem7 10437 r1wunlim 10660 noresle 27677 nosupprefixmo 27680 noinfprefixmo 27681 fmla 35594 ex-sategoelelomsuc 35639 ontgval 36644 sucneqond 37617 finxpreclem4 37646 finxpsuclem 37649 dfsuccl4 38722 suceldisj 39066 onexgt 43594 onepsuc 43606 ordnexbtwnsuc 43621 nlimsuc 43794 sucomisnotcard 43897 |
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