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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 2761 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 877 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6411 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ suc 𝐴 ↔ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴))) | |
| 4 | 2, 3 | mpbiri 260 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ suc 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ wo 858 = wceq 1559 ∈ wcel 2141 suc csuc 6343 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-tru 1562 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-v 3455 df-un 3907 df-sn 4580 df-suc 6347 |
| This theorem is referenced by: sucid 6425 nsuceq0 6426 trsuc 6430 sucssel 6438 ordsuc 7789 onpsssuc 7794 nlimsucg 7817 peano3 7866 tfrlem11 8353 tfrlem13 8355 tz7.44-2 8372 omeulem1 8545 oeordi 8551 oeeulem 8565 dif1enlem 9122 rexdif1en 9123 dif1en 9124 php4 9172 wofib 9487 suc11reg 9568 cantnfle 9620 cantnflt2 9622 cantnfp1lem3 9629 cantnflem1 9638 dfac12lem1 10094 dfac12lem2 10095 ttukeylem3 10462 ttukeylem7 10466 r1wunlim 10689 noresle 27749 nosupprefixmo 27752 noinfprefixmo 27753 fmla 35692 ex-sategoelelomsuc 35737 ontgval 36752 sucneqond 37820 finxpreclem4 37849 finxpsuclem 37852 dfsuccl4 38934 suceldisj 39278 onexgt 43778 onepsuc 43790 ordnexbtwnsuc 43805 nlimsuc 43978 sucomisnotcard 44081 |
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