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Theorem trirec0 14076
Description: Every real number having a reciprocal or equaling zero is equivalent to real number trichotomy.

This is the key part of the definition of what is known as a discrete field, so "the real numbers are a discrete field" can be taken as an equivalent way to state real trichotomy (see further discussion at trilpo 14075). (Contributed by Jim Kingdon, 10-Jun-2024.)

Assertion
Ref Expression
trirec0 (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
Distinct variable group:   𝑥,𝑦,𝑧

Proof of Theorem trirec0
Dummy variable 𝑤 is distinct from all other variables.
StepHypRef Expression
1 simpll 524 . . . . . 6 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 < 0) → 𝑥 ∈ ℝ)
2 simpr 109 . . . . . . 7 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 < 0) → 𝑥 < 0)
31, 2lt0ap0d 8568 . . . . . 6 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 < 0) → 𝑥 # 0)
4 rerecclap 8647 . . . . . . 7 ((𝑥 ∈ ℝ ∧ 𝑥 # 0) → (1 / 𝑥) ∈ ℝ)
5 recn 7907 . . . . . . . 8 (𝑥 ∈ ℝ → 𝑥 ∈ ℂ)
6 recidap 8603 . . . . . . . 8 ((𝑥 ∈ ℂ ∧ 𝑥 # 0) → (𝑥 · (1 / 𝑥)) = 1)
75, 6sylan 281 . . . . . . 7 ((𝑥 ∈ ℝ ∧ 𝑥 # 0) → (𝑥 · (1 / 𝑥)) = 1)
8 oveq2 5861 . . . . . . . . 9 (𝑧 = (1 / 𝑥) → (𝑥 · 𝑧) = (𝑥 · (1 / 𝑥)))
98eqeq1d 2179 . . . . . . . 8 (𝑧 = (1 / 𝑥) → ((𝑥 · 𝑧) = 1 ↔ (𝑥 · (1 / 𝑥)) = 1))
109rspcev 2834 . . . . . . 7 (((1 / 𝑥) ∈ ℝ ∧ (𝑥 · (1 / 𝑥)) = 1) → ∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1)
114, 7, 10syl2anc 409 . . . . . 6 ((𝑥 ∈ ℝ ∧ 𝑥 # 0) → ∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1)
121, 3, 11syl2anc 409 . . . . 5 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 < 0) → ∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1)
1312orcd 728 . . . 4 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 < 0) → (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
14 simpr 109 . . . . 5 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 = 0) → 𝑥 = 0)
1514olcd 729 . . . 4 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 𝑥 = 0) → (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
16 simpll 524 . . . . . 6 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 0 < 𝑥) → 𝑥 ∈ ℝ)
17 simpr 109 . . . . . . 7 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 0 < 𝑥) → 0 < 𝑥)
1816, 17gt0ap0d 8548 . . . . . 6 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 0 < 𝑥) → 𝑥 # 0)
1916, 18, 11syl2anc 409 . . . . 5 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 0 < 𝑥) → ∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1)
2019orcd 728 . . . 4 (((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) ∧ 0 < 𝑥) → (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
21 0re 7920 . . . . . 6 0 ∈ ℝ
22 breq2 3993 . . . . . . . 8 (𝑦 = 0 → (𝑥 < 𝑦𝑥 < 0))
23 eqeq2 2180 . . . . . . . 8 (𝑦 = 0 → (𝑥 = 𝑦𝑥 = 0))
24 breq1 3992 . . . . . . . 8 (𝑦 = 0 → (𝑦 < 𝑥 ↔ 0 < 𝑥))
2522, 23, 243orbi123d 1306 . . . . . . 7 (𝑦 = 0 → ((𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) ↔ (𝑥 < 0 ∨ 𝑥 = 0 ∨ 0 < 𝑥)))
2625rspcv 2830 . . . . . 6 (0 ∈ ℝ → (∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) → (𝑥 < 0 ∨ 𝑥 = 0 ∨ 0 < 𝑥)))
2721, 26ax-mp 5 . . . . 5 (∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) → (𝑥 < 0 ∨ 𝑥 = 0 ∨ 0 < 𝑥))
2827adantl 275 . . . 4 ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) → (𝑥 < 0 ∨ 𝑥 = 0 ∨ 0 < 𝑥))
2913, 15, 20, 28mpjao3dan 1302 . . 3 ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)) → (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
3029ralimiaa 2532 . 2 (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) → ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
31 oveq1 5860 . . . . . . 7 (𝑥 = 𝑤 → (𝑥 · 𝑧) = (𝑤 · 𝑧))
3231eqeq1d 2179 . . . . . 6 (𝑥 = 𝑤 → ((𝑥 · 𝑧) = 1 ↔ (𝑤 · 𝑧) = 1))
3332rexbidv 2471 . . . . 5 (𝑥 = 𝑤 → (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ↔ ∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1))
34 eqeq1 2177 . . . . 5 (𝑥 = 𝑤 → (𝑥 = 0 ↔ 𝑤 = 0))
3533, 34orbi12d 788 . . . 4 (𝑥 = 𝑤 → ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ↔ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0)))
3635cbvralv 2696 . . 3 (∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ↔ ∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0))
37 nfcv 2312 . . . . . . . . 9 𝑧
38 nfre1 2513 . . . . . . . . . 10 𝑧𝑧 ∈ ℝ (𝑤 · 𝑧) = 1
39 nfv 1521 . . . . . . . . . 10 𝑧 𝑤 = 0
4038, 39nfor 1567 . . . . . . . . 9 𝑧(∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0)
4137, 40nfralya 2510 . . . . . . . 8 𝑧𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0)
42 nfv 1521 . . . . . . . 8 𝑧(𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)
4341, 42nfan 1558 . . . . . . 7 𝑧(∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ))
44 nfv 1521 . . . . . . 7 𝑧(𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)
45 simpr 109 . . . . . . . . . . 11 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → (𝑦𝑥) < 0)
46 simprr 527 . . . . . . . . . . . . . 14 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝑦 ∈ ℝ)
4746ad2antrr 485 . . . . . . . . . . . . 13 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑦 ∈ ℝ)
4847adantr 274 . . . . . . . . . . . 12 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → 𝑦 ∈ ℝ)
49 simprl 526 . . . . . . . . . . . . . 14 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝑥 ∈ ℝ)
5049ad2antrr 485 . . . . . . . . . . . . 13 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑥 ∈ ℝ)
5150adantr 274 . . . . . . . . . . . 12 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → 𝑥 ∈ ℝ)
5248, 51sublt0d 8489 . . . . . . . . . . 11 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → ((𝑦𝑥) < 0 ↔ 𝑦 < 𝑥))
5345, 52mpbid 146 . . . . . . . . . 10 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → 𝑦 < 𝑥)
54533mix3d 1169 . . . . . . . . 9 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ (𝑦𝑥) < 0) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
55 simpr 109 . . . . . . . . . . 11 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → 0 < (𝑦𝑥))
5650adantr 274 . . . . . . . . . . . 12 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → 𝑥 ∈ ℝ)
5747adantr 274 . . . . . . . . . . . 12 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → 𝑦 ∈ ℝ)
5856, 57posdifd 8451 . . . . . . . . . . 11 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → (𝑥 < 𝑦 ↔ 0 < (𝑦𝑥)))
5955, 58mpbird 166 . . . . . . . . . 10 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → 𝑥 < 𝑦)
60593mix1d 1167 . . . . . . . . 9 (((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) ∧ 0 < (𝑦𝑥)) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
6147recnd 7948 . . . . . . . . . . . 12 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑦 ∈ ℂ)
6250recnd 7948 . . . . . . . . . . . 12 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑥 ∈ ℂ)
6361, 62subcld 8230 . . . . . . . . . . 11 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → (𝑦𝑥) ∈ ℂ)
64 simplr 525 . . . . . . . . . . . 12 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑧 ∈ ℝ)
6564recnd 7948 . . . . . . . . . . 11 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → 𝑧 ∈ ℂ)
66 simpr 109 . . . . . . . . . . . 12 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → ((𝑦𝑥) · 𝑧) = 1)
67 1ap0 8509 . . . . . . . . . . . 12 1 # 0
6866, 67eqbrtrdi 4028 . . . . . . . . . . 11 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → ((𝑦𝑥) · 𝑧) # 0)
6963, 65, 68mulap0bad 8577 . . . . . . . . . 10 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → (𝑦𝑥) # 0)
7046, 49resubcld 8300 . . . . . . . . . . . 12 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑦𝑥) ∈ ℝ)
7170ad2antrr 485 . . . . . . . . . . 11 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → (𝑦𝑥) ∈ ℝ)
72 reaplt 8507 . . . . . . . . . . 11 (((𝑦𝑥) ∈ ℝ ∧ 0 ∈ ℝ) → ((𝑦𝑥) # 0 ↔ ((𝑦𝑥) < 0 ∨ 0 < (𝑦𝑥))))
7371, 21, 72sylancl 411 . . . . . . . . . 10 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → ((𝑦𝑥) # 0 ↔ ((𝑦𝑥) < 0 ∨ 0 < (𝑦𝑥))))
7469, 73mpbid 146 . . . . . . . . 9 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → ((𝑦𝑥) < 0 ∨ 0 < (𝑦𝑥)))
7554, 60, 74mpjaodan 793 . . . . . . . 8 ((((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ 𝑧 ∈ ℝ) ∧ ((𝑦𝑥) · 𝑧) = 1) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
7675exp31 362 . . . . . . 7 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑧 ∈ ℝ → (((𝑦𝑥) · 𝑧) = 1 → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))))
7743, 44, 76rexlimd 2584 . . . . . 6 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (∃𝑧 ∈ ℝ ((𝑦𝑥) · 𝑧) = 1 → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥)))
7877imp 123 . . . . 5 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ ∃𝑧 ∈ ℝ ((𝑦𝑥) · 𝑧) = 1) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
7946recnd 7948 . . . . . . . . 9 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝑦 ∈ ℂ)
8079adantr 274 . . . . . . . 8 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → 𝑦 ∈ ℂ)
8149recnd 7948 . . . . . . . . 9 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → 𝑥 ∈ ℂ)
8281adantr 274 . . . . . . . 8 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → 𝑥 ∈ ℂ)
83 simpr 109 . . . . . . . 8 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → (𝑦𝑥) = 0)
8480, 82, 83subeq0d 8238 . . . . . . 7 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → 𝑦 = 𝑥)
8584equcomd 1700 . . . . . 6 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → 𝑥 = 𝑦)
86853mix2d 1168 . . . . 5 (((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) ∧ (𝑦𝑥) = 0) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
87 oveq1 5860 . . . . . . . . 9 (𝑤 = (𝑦𝑥) → (𝑤 · 𝑧) = ((𝑦𝑥) · 𝑧))
8887eqeq1d 2179 . . . . . . . 8 (𝑤 = (𝑦𝑥) → ((𝑤 · 𝑧) = 1 ↔ ((𝑦𝑥) · 𝑧) = 1))
8988rexbidv 2471 . . . . . . 7 (𝑤 = (𝑦𝑥) → (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ↔ ∃𝑧 ∈ ℝ ((𝑦𝑥) · 𝑧) = 1))
90 eqeq1 2177 . . . . . . 7 (𝑤 = (𝑦𝑥) → (𝑤 = 0 ↔ (𝑦𝑥) = 0))
9189, 90orbi12d 788 . . . . . 6 (𝑤 = (𝑦𝑥) → ((∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ↔ (∃𝑧 ∈ ℝ ((𝑦𝑥) · 𝑧) = 1 ∨ (𝑦𝑥) = 0)))
92 simpl 108 . . . . . 6 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → ∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0))
9391, 92, 70rspcdva 2839 . . . . 5 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (∃𝑧 ∈ ℝ ((𝑦𝑥) · 𝑧) = 1 ∨ (𝑦𝑥) = 0))
9478, 86, 93mpjaodan 793 . . . 4 ((∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
9594ralrimivva 2552 . . 3 (∀𝑤 ∈ ℝ (∃𝑧 ∈ ℝ (𝑤 · 𝑧) = 1 ∨ 𝑤 = 0) → ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
9636, 95sylbi 120 . 2 (∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) → ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥))
9730, 96impbii 125 1 (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦𝑥 = 𝑦𝑦 < 𝑥) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104  wo 703  w3o 972   = wceq 1348  wcel 2141  wral 2448  wrex 2449   class class class wbr 3989  (class class class)co 5853  cc 7772  cr 7773  0cc0 7774  1c1 7775   · cmul 7779   < clt 7954  cmin 8090   # cap 8500   / cdiv 8589
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891  ax-pre-mulext 7892
This theorem depends on definitions:  df-bi 116  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rmo 2456  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-po 4281  df-iso 4282  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-iota 5160  df-fun 5200  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-reap 8494  df-ap 8501  df-div 8590
This theorem is referenced by:  trirec0xor  14077
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