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| Mirrors > Home > MPE Home > Th. List > Mathboxes > trcoss | Structured version Visualization version GIF version | ||
| Description: Sufficient condition for the transitivity of cosets by 𝑅. (Contributed by Peter Mazsa, 26-Dec-2018.) |
| Ref | Expression |
|---|---|
| trcoss | ⊢ (∀𝑦∃*𝑢 𝑢𝑅𝑦 → ∀𝑥∀𝑦∀𝑧((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) → 𝑥 ≀ 𝑅𝑧)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | moantr 39062 | . . . . 5 ⊢ (∃*𝑢 𝑢𝑅𝑦 → ((∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑦) ∧ ∃𝑢(𝑢𝑅𝑦 ∧ 𝑢𝑅𝑧)) → ∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑧))) | |
| 2 | brcoss 39211 | . . . . . . 7 ⊢ ((𝑥 ∈ V ∧ 𝑦 ∈ V) → (𝑥 ≀ 𝑅𝑦 ↔ ∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑦))) | |
| 3 | 2 | el2v 3465 | . . . . . 6 ⊢ (𝑥 ≀ 𝑅𝑦 ↔ ∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑦)) |
| 4 | brcoss 39211 | . . . . . . 7 ⊢ ((𝑦 ∈ V ∧ 𝑧 ∈ V) → (𝑦 ≀ 𝑅𝑧 ↔ ∃𝑢(𝑢𝑅𝑦 ∧ 𝑢𝑅𝑧))) | |
| 5 | 4 | el2v 3465 | . . . . . 6 ⊢ (𝑦 ≀ 𝑅𝑧 ↔ ∃𝑢(𝑢𝑅𝑦 ∧ 𝑢𝑅𝑧)) |
| 6 | 3, 5 | anbi12i 640 | . . . . 5 ⊢ ((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) ↔ (∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑦) ∧ ∃𝑢(𝑢𝑅𝑦 ∧ 𝑢𝑅𝑧))) |
| 7 | brcoss 39211 | . . . . . 6 ⊢ ((𝑥 ∈ V ∧ 𝑧 ∈ V) → (𝑥 ≀ 𝑅𝑧 ↔ ∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑧))) | |
| 8 | 7 | el2v 3465 | . . . . 5 ⊢ (𝑥 ≀ 𝑅𝑧 ↔ ∃𝑢(𝑢𝑅𝑥 ∧ 𝑢𝑅𝑧)) |
| 9 | 1, 6, 8 | 3imtr4g 299 | . . . 4 ⊢ (∃*𝑢 𝑢𝑅𝑦 → ((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) → 𝑥 ≀ 𝑅𝑧)) |
| 10 | 9 | alrimiv 1960 | . . 3 ⊢ (∃*𝑢 𝑢𝑅𝑦 → ∀𝑧((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) → 𝑥 ≀ 𝑅𝑧)) |
| 11 | 10 | alimi 1844 | . 2 ⊢ (∀𝑦∃*𝑢 𝑢𝑅𝑦 → ∀𝑦∀𝑧((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) → 𝑥 ≀ 𝑅𝑧)) |
| 12 | 11 | alrimiv 1960 | 1 ⊢ (∀𝑦∃*𝑢 𝑢𝑅𝑦 → ∀𝑥∀𝑦∀𝑧((𝑥 ≀ 𝑅𝑦 ∧ 𝑦 ≀ 𝑅𝑧) → 𝑥 ≀ 𝑅𝑧)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∀wal 1568 ∃wex 1812 ∃*wmo 2568 Vcvv 3458 class class class wbr 5114 ≀ ccoss 38873 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-clab 2745 df-cleq 2758 df-clel 2841 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-coss 39191 |
| This theorem is used by: disjim 39574 |
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