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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 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 848 = wceq 1542 ∈ wcel 2114 suc csuc 6319 |
| 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 3432 df-un 3895 df-sn 4569 df-suc 6323 |
| This theorem is referenced by: sucid 6401 nsuceq0 6402 trsuc 6406 sucssel 6414 ordsuc 7758 onpsssuc 7763 nlimsucg 7786 tfrlem11 8320 tfrlem13 8322 tz7.44-2 8339 omeulem1 8510 oeordi 8516 oeeulem 8530 dif1enlem 9087 rexdif1en 9088 dif1en 9089 php4 9137 wofib 9453 suc11reg 9531 cantnfle 9583 cantnflt2 9585 cantnfp1lem3 9592 cantnflem1 9601 dfac12lem1 10057 dfac12lem2 10058 ttukeylem3 10424 ttukeylem7 10428 r1wunlim 10651 noresle 27675 nosupprefixmo 27678 noinfprefixmo 27679 fmla 35579 ex-sategoelelomsuc 35624 ontgval 36629 sucneqond 37695 finxpreclem4 37724 finxpsuclem 37727 dfsuccl4 38809 suceldisj 39153 onexgt 43686 onepsuc 43698 ordnexbtwnsuc 43713 nlimsuc 43886 sucomisnotcard 43989 |
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