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Theorem ltnles 27717
Description: Surreal less-than in terms of less-than or equal. (Contributed by Scott Fenton, 8-Dec-2021.)
Assertion
Ref Expression
ltnles ((𝐴 No 𝐵 No ) → (𝐴 <s 𝐵 ↔ ¬ 𝐵 ≤s 𝐴))

Proof of Theorem ltnles
StepHypRef Expression
1 lenlts 27716 . . 3 ((𝐵 No 𝐴 No ) → (𝐵 ≤s 𝐴 ↔ ¬ 𝐴 <s 𝐵))
21ancoms 458 . 2 ((𝐴 No 𝐵 No ) → (𝐵 ≤s 𝐴 ↔ ¬ 𝐴 <s 𝐵))
32con2bid 354 1 ((𝐴 No 𝐵 No ) → (𝐴 <s 𝐵 ↔ ¬ 𝐵 ≤s 𝐴))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 206  wa 395  wcel 2114   class class class wbr 5085   No csur 27603   <s clts 27604   ≤s cles 27708
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2708  ax-sep 5231  ax-pr 5375
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2715  df-cleq 2728  df-clel 2811  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-sn 4568  df-pr 4570  df-op 4574  df-br 5086  df-opab 5148  df-xp 5637  df-cnv 5639  df-les 27709
This theorem is referenced by:  ltsnled  27721  lestric  27732  lesrec  27791  ltsrec  27793  eqcuts3  27796  cutlt  27924  leadds1im  27979  leadds1  27981  ltadds2  27983  abssnid  28235
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