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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 2769 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 879 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6432 | . 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 |
| Syntax hints: → wi 4 ∨ wo 860 = wceq 1567 ∈ wcel 2149 suc csuc 6363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-tru 1570 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-v 3465 df-un 3918 df-sn 4595 df-suc 6367 |
| This theorem is referenced by: sucid 6446 nsuceq0 6447 trsuc 6451 sucssel 6459 ordsuc 7810 onpsssuc 7815 nlimsucg 7838 peano3 7887 tfrlem11 8375 tfrlem13 8377 tz7.44-2 8394 omeulem1 8567 oeordi 8573 oeeulem 8587 dif1enlem 9144 rexdif1en 9145 dif1en 9146 php4 9194 wofib 9507 suc11reg 9588 cantnfle 9640 cantnflt2 9642 cantnfp1lem3 9649 cantnflem1 9658 dfac12lem1 10127 dfac12lem2 10128 ttukeylem3 10495 ttukeylem7 10499 r1wunlim 10722 noresle 27827 nosupprefixmo 27830 noinfprefixmo 27831 fmla 35772 ex-sategoelelomsuc 35817 ontgval 36831 sucneqond 37899 finxpreclem4 37928 finxpsuclem 37931 dfsuccl4 39013 suceldisj 39357 onexgt 43859 onepsuc 43871 ordnexbtwnsuc 43886 nlimsuc 44059 sucomisnotcard 44162 |
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