Theorem bj-peano2 16882

Description: Constructive proof of peano2 4740. Temporary note: another possibility is to simply replace sucexg 4643 with bj-sucexg 16865 in the proof of peano2 4740. (Contributed by BJ, 18-Nov-2019.) (Proof modification is discouraged.)

Assertion

Ref	Expression
bj-peano2	⊢ (𝐴 ∈ ω → suc 𝐴 ∈ ω)

Proof of Theorem bj-peano2

Step	Hyp	Ref	Expression
1		bj-omind 16877	. 2 ⊢ Ind ω
2		bj-indsuc 16871	. 2 ⊢ (Ind ω → (𝐴 ∈ ω → suc 𝐴 ∈ ω))
3	1, 2	ax-mp 5	1 ⊢ (𝐴 ∈ ω → suc 𝐴 ∈ ω)

Syntax hints:   → wi 4   ∈ wcel 2209  suc csuc 4508  ωcom 4735  Ind wind 16869

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-nul 4257  ax-pr 4344  ax-un 4576  ax-bd0 16756  ax-bdor 16759  ax-bdex 16762  ax-bdeq 16763  ax-bdel 16764  ax-bdsep 16827

This theorem depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-dif 3222  df-un 3224  df-nul 3521  df-sn 3714  df-pr 3715  df-uni 3934  df-int 3969  df-suc 4514  df-iom 4736  df-bj-ind 16870

This theorem is referenced by:  bj-nn0suc  16907  bj-nn0sucALT  16921