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Theorem genplt2i 6665
 Description: Operating on both sides of two inequalities, when the operation is consistent with
Hypotheses
Ref Expression
genplt2i.ord ((𝑥Q𝑦Q𝑧Q) → (𝑥 <Q 𝑦 ↔ (𝑧𝐺𝑥) <Q (𝑧𝐺𝑦)))
genplt2i.com ((𝑥Q𝑦Q) → (𝑥𝐺𝑦) = (𝑦𝐺𝑥))
Assertion
Ref Expression
genplt2i ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐴𝐺𝐶) <Q (𝐵𝐺𝐷))
Distinct variable groups:   𝑥,𝐴,𝑦,𝑧   𝑥,𝐵,𝑦,𝑧   𝑥,𝐶,𝑦,𝑧   𝑥,𝐷,𝑦,𝑧   𝑥,𝐺,𝑦,𝑧

Proof of Theorem genplt2i
StepHypRef Expression
1 simpl 106 . . 3 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐴 <Q 𝐵)
2 genplt2i.ord . . . . 5 ((𝑥Q𝑦Q𝑧Q) → (𝑥 <Q 𝑦 ↔ (𝑧𝐺𝑥) <Q (𝑧𝐺𝑦)))
32adantl 266 . . . 4 (((𝐴 <Q 𝐵𝐶 <Q 𝐷) ∧ (𝑥Q𝑦Q𝑧Q)) → (𝑥 <Q 𝑦 ↔ (𝑧𝐺𝑥) <Q (𝑧𝐺𝑦)))
4 ltrelnq 6520 . . . . . 6 <Q ⊆ (Q × Q)
54brel 4419 . . . . 5 (𝐴 <Q 𝐵 → (𝐴Q𝐵Q))
64brel 4419 . . . . 5 (𝐶 <Q 𝐷 → (𝐶Q𝐷Q))
7 simpll 489 . . . . 5 (((𝐴Q𝐵Q) ∧ (𝐶Q𝐷Q)) → 𝐴Q)
85, 6, 7syl2an 277 . . . 4 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐴Q)
9 simplr 490 . . . . 5 (((𝐴Q𝐵Q) ∧ (𝐶Q𝐷Q)) → 𝐵Q)
105, 6, 9syl2an 277 . . . 4 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐵Q)
11 simprl 491 . . . . 5 (((𝐴Q𝐵Q) ∧ (𝐶Q𝐷Q)) → 𝐶Q)
125, 6, 11syl2an 277 . . . 4 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐶Q)
13 genplt2i.com . . . . 5 ((𝑥Q𝑦Q) → (𝑥𝐺𝑦) = (𝑦𝐺𝑥))
1413adantl 266 . . . 4 (((𝐴 <Q 𝐵𝐶 <Q 𝐷) ∧ (𝑥Q𝑦Q)) → (𝑥𝐺𝑦) = (𝑦𝐺𝑥))
153, 8, 10, 12, 14caovord2d 5697 . . 3 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐴 <Q 𝐵 ↔ (𝐴𝐺𝐶) <Q (𝐵𝐺𝐶)))
161, 15mpbid 139 . 2 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐴𝐺𝐶) <Q (𝐵𝐺𝐶))
17 simpr 107 . . 3 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐶 <Q 𝐷)
18 simprr 492 . . . . 5 (((𝐴Q𝐵Q) ∧ (𝐶Q𝐷Q)) → 𝐷Q)
195, 6, 18syl2an 277 . . . 4 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → 𝐷Q)
203, 12, 19, 10caovordd 5696 . . 3 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐶 <Q 𝐷 ↔ (𝐵𝐺𝐶) <Q (𝐵𝐺𝐷)))
2117, 20mpbid 139 . 2 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐵𝐺𝐶) <Q (𝐵𝐺𝐷))
22 ltsonq 6553 . . 3 <Q Or Q
2322, 4sotri 4747 . 2 (((𝐴𝐺𝐶) <Q (𝐵𝐺𝐶) ∧ (𝐵𝐺𝐶) <Q (𝐵𝐺𝐷)) → (𝐴𝐺𝐶) <Q (𝐵𝐺𝐷))
2416, 21, 23syl2anc 397 1 ((𝐴 <Q 𝐵𝐶 <Q 𝐷) → (𝐴𝐺𝐶) <Q (𝐵𝐺𝐷))
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 101   ↔ wb 102   ∧ w3a 896   = wceq 1259   ∈ wcel 1409   class class class wbr 3791  (class class class)co 5539  Qcnq 6435
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