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Theorem bj-nnen2lp 14745
Description: A version of en2lp 4555 for natural numbers, which does not require ax-setind 4538.

Note: using this theorem and bj-nnelirr 14744, one can remove dependency on ax-setind 4538 from nntri2 6497 and nndcel 6503; one can actually remove more dependencies from these. (Contributed by BJ, 28-Nov-2019.) (Proof modification is discouraged.)

Assertion
Ref Expression
bj-nnen2lp ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ¬ (𝐴𝐵𝐵𝐴))

Proof of Theorem bj-nnen2lp
StepHypRef Expression
1 bj-nnelirr 14744 . . 3 (𝐵 ∈ ω → ¬ 𝐵𝐵)
21adantl 277 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ¬ 𝐵𝐵)
3 bj-nntrans 14742 . . . . 5 (𝐵 ∈ ω → (𝐴𝐵𝐴𝐵))
43adantl 277 . . . 4 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴𝐵𝐴𝐵))
5 ssel 3151 . . . 4 (𝐴𝐵 → (𝐵𝐴𝐵𝐵))
64, 5syl6 33 . . 3 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴𝐵 → (𝐵𝐴𝐵𝐵)))
76impd 254 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ((𝐴𝐵𝐵𝐴) → 𝐵𝐵))
82, 7mtod 663 1 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ¬ (𝐴𝐵𝐵𝐴))
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wa 104  wcel 2148  wss 3131  ωcom 4591
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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-nul 4131  ax-pr 4211  ax-un 4435  ax-bd0 14604  ax-bdor 14607  ax-bdn 14608  ax-bdal 14609  ax-bdex 14610  ax-bdeq 14611  ax-bdel 14612  ax-bdsb 14613  ax-bdsep 14675  ax-infvn 14732
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-rab 2464  df-v 2741  df-dif 3133  df-un 3135  df-in 3137  df-ss 3144  df-nul 3425  df-sn 3600  df-pr 3601  df-uni 3812  df-int 3847  df-suc 4373  df-iom 4592  df-bdc 14632  df-bj-ind 14718
This theorem is referenced by:  bj-peano4  14746
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