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Theorem bj-nnen2lp 15192
Description: A version of en2lp 4574 for natural numbers, which does not require ax-setind 4557.

Note: using this theorem and bj-nnelirr 15191, one can remove dependency on ax-setind 4557 from nntri2 6523 and nndcel 6529; 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 15191 . . 3 (𝐵 ∈ ω → ¬ 𝐵𝐵)
21adantl 277 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ¬ 𝐵𝐵)
3 bj-nntrans 15189 . . . . 5 (𝐵 ∈ ω → (𝐴𝐵𝐴𝐵))
43adantl 277 . . . 4 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴𝐵𝐴𝐵))
5 ssel 3164 . . . 4 (𝐴𝐵 → (𝐵𝐴𝐵𝐵))
64, 5syl6 33 . . 3 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴𝐵 → (𝐵𝐴𝐵𝐵)))
76impd 254 . 2 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ((𝐴𝐵𝐵𝐴) → 𝐵𝐵))
82, 7mtod 664 1 ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → ¬ (𝐴𝐵𝐵𝐴))
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wa 104  wcel 2160  wss 3144  ωcom 4610
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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2162  ax-14 2163  ax-ext 2171  ax-nul 4147  ax-pr 4230  ax-un 4454  ax-bd0 15051  ax-bdor 15054  ax-bdn 15055  ax-bdal 15056  ax-bdex 15057  ax-bdeq 15058  ax-bdel 15059  ax-bdsb 15060  ax-bdsep 15122  ax-infvn 15179
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2176  df-cleq 2182  df-clel 2185  df-nfc 2321  df-ral 2473  df-rex 2474  df-rab 2477  df-v 2754  df-dif 3146  df-un 3148  df-in 3150  df-ss 3157  df-nul 3438  df-sn 3616  df-pr 3617  df-uni 3828  df-int 3863  df-suc 4392  df-iom 4611  df-bdc 15079  df-bj-ind 15165
This theorem is referenced by:  bj-peano4  15193
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