Theorem bj-peano2 16726

Description: Constructive proof of peano2 4719. Temporary note: another possibility is to simply replace sucexg 4622 with bj-sucexg 16709 in the proof of peano2 4719. (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 16721	. 2 ⊢ Ind ω
2		bj-indsuc 16715	. 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 2205  suc csuc 4488  ωcom 4714  Ind wind 16713

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-nul 4238  ax-pr 4324  ax-un 4556  ax-bd0 16600  ax-bdor 16603  ax-bdex 16606  ax-bdeq 16607  ax-bdel 16608  ax-bdsb 16609  ax-bdsep 16671

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-rab 2531  df-v 2817  df-dif 3215  df-un 3217  df-nul 3511  df-sn 3697  df-pr 3698  df-uni 3917  df-int 3952  df-suc 4494  df-iom 4715  df-bdc 16628  df-bj-ind 16714

This theorem is referenced by:  bj-nn0suc  16751  bj-nn0sucALT  16765