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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 2763 | . . 3 ⊢ 𝐴 = 𝐴 | |
| 2 | 1 | olci 880 | . 2 ⊢ (𝐴 ∈ 𝐴 ∨ 𝐴 = 𝐴) |
| 3 | elsucg 6459 | . 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 |
| This proof depends on syntax axioms: → wi 4 ∨ wo 861 = wceq 1570 ∈ wcel 2147 suc csuc 6390 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-v 3456 df-un 4154 df-sn 4589 df-suc 6394 |
| This theorem is used by: sucid 6473 nsuceq0 6474 trsuc 6478 sucssel 6486 ordsuc 7859 onpsssuc 7864 nlimsucg 7887 peano3 7936 tfrlem11 8434 tfrlem13 8436 tz7.44-2 8453 omeulem1 8628 oeordi 8634 oeeulem 8648 dif1enlem 9213 rexdif1en 9214 dif1en 9215 php4 9263 wofib 9576 suc11reg 9657 cantnfle 9709 cantnflt2 9711 cantnfp1lem3 9718 cantnflem1 9727 dfac12lem1 10261 dfac12lem2 10262 ttukeylem3 10628 ttukeylem7 10632 r1wunlim 10861 noresle 28111 nosupprefixmo 28114 noinfprefixmo 28115 eqsucidi 35831 8olt9o 35914 7olt9o 35915 6olt9o 35916 5olt9o 35917 4olt9o 35918 3olt9o 35919 2olt9o 35920 1olt9o 35921 fmla 36354 ex-sategoelelomsuc 36399 ontgval 37434 sucneqond 38556 finxpreclem4 38585 finxpsuclem 38588 dfsuccl4 39672 suceldisj 40016 onexgt 44503 onepsuc 44515 ordnexbtwnsuc 44530 nlimsuc 44703 sucomisnotcard 44806 |
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