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Theorem ltprord 3928
Description: Positive real 'less than' in terms of proper subset.
Assertion
Ref Expression
ltprord ((APBP) → (A<P BAB))

Proof of Theorem ltprord
StepHypRef Expression
1 eleq1 1149 . . . . 5 (x = A → (xPAP))
21anbi1d 469 . . . 4 (x = A → ((xPyP) ↔ (APyP)))
3 psseq1 1559 . . . 4 (x = A → (xyAy))
42, 3anbi12d 476 . . 3 (x = A → (((xPyP) ∧ xy) ↔ ((APyP) ∧ Ay)))
5 eleq1 1149 . . . . 5 (y = B → (yPBP))
65anbi2d 468 . . . 4 (y = B → ((APyP) ↔ (APBP)))
7 psseq2 1560 . . . 4 (y = B → (AyAB))
86, 7anbi12d 476 . . 3 (y = B → (((APyP) ∧ Ay) ↔ ((APBP) ∧ AB)))
9 df-ltp 3884 . . 3 <P = {⟨x, y⟩∣((xPyP) ∧ xy)}
104, 8, 9brabg 2116 . 2 ((APBP) → (A<P B ↔ ((APBP) ∧ AB)))
11 ibar 487 . 2 ((APBP) → (AB ↔ ((APBP) ∧ AB)))
1210, 11bitr4d 409 1 ((APBP) → (A<P BAB))
Colors of variables: wff set class
Syntax hints:   → wi 2   ↔ wb 127   ∧ wa 196   = wceq 1091   ∈ wcel 1092   ⊂ wpss 1488   class class class wbr 2054  Pcnp 3779  <P cltp 3783
This theorem is referenced by:  ltsopr 3930  ltaddpr 3934  ltexprlem7 3942  ltexpri 3943  suplem1pr 3955  suplem2pr 3956
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-ne 1192  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-pss 1494  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-br 2063  df-opab 2098  df-ltp 3884
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