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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 2736 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 866 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6387 | . 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 847 = wceq 1541 ∈ wcel 2113 suc csuc 6319 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-v 3442 df-un 3906 df-sn 4581 df-suc 6323 |
| This theorem is referenced by: sucid 6401 nsuceq0 6402 trsuc 6406 sucssel 6414 ordsuc 7756 onpsssuc 7761 nlimsucg 7784 tfrlem11 8319 tfrlem13 8321 tz7.44-2 8338 omeulem1 8509 oeordi 8515 oeeulem 8529 dif1enlem 9084 rexdif1en 9085 dif1en 9086 php4 9134 wofib 9450 suc11reg 9528 cantnfle 9580 cantnflt2 9582 cantnfp1lem3 9589 cantnflem1 9598 dfac12lem1 10054 dfac12lem2 10055 ttukeylem3 10421 ttukeylem7 10425 r1wunlim 10648 noresle 27665 nosupprefixmo 27668 noinfprefixmo 27669 fmla 35575 ex-sategoelelomsuc 35620 ontgval 36625 sucneqond 37570 finxpreclem4 37599 finxpsuclem 37602 dfsuccl4 38648 onexgt 43482 onepsuc 43494 ordnexbtwnsuc 43509 nlimsuc 43682 sucomisnotcard 43785 |
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