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| Mirrors > Home > ILE Home > Th. List > Mathboxes > trirec0xor | GIF version | ||
| Description: Version of trirec0 16098 with exclusive-or.
The definition of a discrete field is sometimes stated in terms of exclusive-or but as proved here, this is equivalent to inclusive-or because the two disjuncts cannot be simultaneously true. (Contributed by Jim Kingdon, 10-Jun-2024.) |
| Ref | Expression |
|---|---|
| trirec0xor | ⊢ (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 < 𝑥) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ⊻ 𝑥 = 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | trirec0 16098 | . 2 ⊢ (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 < 𝑥) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0)) | |
| 2 | 1ne0 9117 | . . . . . . . 8 ⊢ 1 ≠ 0 | |
| 3 | 2 | nesymi 2423 | . . . . . . 7 ⊢ ¬ 0 = 1 |
| 4 | simpr 110 | . . . . . . . . . . 11 ⊢ (((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) → 𝑥 = 0) | |
| 5 | 4 | oveq1d 5969 | . . . . . . . . . 10 ⊢ (((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) → (𝑥 · 𝑧) = (0 · 𝑧)) |
| 6 | mul02lem2 8473 | . . . . . . . . . 10 ⊢ (𝑧 ∈ ℝ → (0 · 𝑧) = 0) | |
| 7 | 5, 6 | sylan9eqr 2261 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ ∧ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0)) → (𝑥 · 𝑧) = 0) |
| 8 | simprl 529 | . . . . . . . . 9 ⊢ ((𝑧 ∈ ℝ ∧ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0)) → (𝑥 · 𝑧) = 1) | |
| 9 | 7, 8 | eqtr3d 2241 | . . . . . . . 8 ⊢ ((𝑧 ∈ ℝ ∧ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0)) → 0 = 1) |
| 10 | 9 | rexlimiva 2619 | . . . . . . 7 ⊢ (∃𝑧 ∈ ℝ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) → 0 = 1) |
| 11 | 3, 10 | mto 664 | . . . . . 6 ⊢ ¬ ∃𝑧 ∈ ℝ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) |
| 12 | r19.41v 2663 | . . . . . 6 ⊢ (∃𝑧 ∈ ℝ ((𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) ↔ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∧ 𝑥 = 0)) | |
| 13 | 11, 12 | mtbi 672 | . . . . 5 ⊢ ¬ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∧ 𝑥 = 0) |
| 14 | 13 | biantru 302 | . . . 4 ⊢ ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ↔ ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ∧ ¬ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∧ 𝑥 = 0))) |
| 15 | df-xor 1396 | . . . 4 ⊢ ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ⊻ 𝑥 = 0) ↔ ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ∧ ¬ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∧ 𝑥 = 0))) | |
| 16 | 14, 15 | bitr4i 187 | . . 3 ⊢ ((∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ↔ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ⊻ 𝑥 = 0)) |
| 17 | 16 | ralbii 2513 | . 2 ⊢ (∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ∨ 𝑥 = 0) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ⊻ 𝑥 = 0)) |
| 18 | 1, 17 | bitri 184 | 1 ⊢ (∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ (𝑥 < 𝑦 ∨ 𝑥 = 𝑦 ∨ 𝑦 < 𝑥) ↔ ∀𝑥 ∈ ℝ (∃𝑧 ∈ ℝ (𝑥 · 𝑧) = 1 ⊻ 𝑥 = 0)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∧ wa 104 ↔ wb 105 ∨ wo 710 ∨ w3o 980 = wceq 1373 ⊻ wxo 1395 ∈ wcel 2177 ∀wral 2485 ∃wrex 2486 class class class wbr 4048 (class class class)co 5954 ℝcr 7937 0cc0 7938 1c1 7939 · cmul 7943 < clt 8120 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4167 ax-pow 4223 ax-pr 4258 ax-un 4485 ax-setind 4590 ax-cnex 8029 ax-resscn 8030 ax-1cn 8031 ax-1re 8032 ax-icn 8033 ax-addcl 8034 ax-addrcl 8035 ax-mulcl 8036 ax-mulrcl 8037 ax-addcom 8038 ax-mulcom 8039 ax-addass 8040 ax-mulass 8041 ax-distr 8042 ax-i2m1 8043 ax-0lt1 8044 ax-1rid 8045 ax-0id 8046 ax-rnegex 8047 ax-precex 8048 ax-cnre 8049 ax-pre-ltirr 8050 ax-pre-ltwlin 8051 ax-pre-lttrn 8052 ax-pre-apti 8053 ax-pre-ltadd 8054 ax-pre-mulgt0 8055 ax-pre-mulext 8056 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-xor 1396 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3001 df-dif 3170 df-un 3172 df-in 3174 df-ss 3181 df-pw 3620 df-sn 3641 df-pr 3642 df-op 3644 df-uni 3854 df-br 4049 df-opab 4111 df-id 4345 df-po 4348 df-iso 4349 df-xp 4686 df-rel 4687 df-cnv 4688 df-co 4689 df-dm 4690 df-iota 5238 df-fun 5279 df-fv 5285 df-riota 5909 df-ov 5957 df-oprab 5958 df-mpo 5959 df-pnf 8122 df-mnf 8123 df-xr 8124 df-ltxr 8125 df-le 8126 df-sub 8258 df-neg 8259 df-reap 8661 df-ap 8668 df-div 8759 |
| This theorem is referenced by: (None) |
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