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Theorem cotr2g 13715
Description: Two ways of saying that the composition of two relations is included in a third relation. See its special instance cotr2 13716 for the main application. (Contributed by RP, 22-Mar-2020.)
Hypotheses
Ref Expression
cotr2g.d dom 𝐵 ⊆ 𝐷
cotr2g.e (ran 𝐵 ∩ dom 𝐴) ⊆ 𝐸
cotr2g.f ran 𝐴 ⊆ 𝐹
Assertion
Ref Expression
cotr2g ((𝐴 ∘ 𝐵) ⊆ 𝐶 ↔ ∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
Distinct variable groups:   𝑥,𝑦,𝑧,𝐴   𝑥,𝐵,𝑦,𝑧   𝑥,𝐶,𝑦,𝑧   𝑥,𝐷,𝑦,𝑧   𝑦,𝐸,𝑧   𝑧,𝐹
Allowed substitution hints:   𝐸(𝑥)   𝐹(𝑥,𝑦)
Proof of Theorem cotr2g
StepHypRef Expression
1 cotrg 5507 . 2 ((𝐴 ∘ 𝐵) ⊆ 𝐶 ↔ ∀𝑥∀𝑦∀𝑧((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
2 nfv 1843 . . . . . 6 Ⅎ𝑦 𝑥 ∈ 𝐷
3 nfv 1843 . . . . . 6 Ⅎ𝑧 𝑥 ∈ 𝐷
42, 319.21-2 2078 . . . . 5 (∀𝑦∀𝑧(𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))) ↔ (𝑥 ∈ 𝐷 → ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
54albii 1747 . . . 4 (∀𝑥∀𝑦∀𝑧(𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))) ↔ ∀𝑥(𝑥 ∈ 𝐷 → ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
6 simpl 473 . . . . . . . . . . 11 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐵𝑦)
7 id 22 . . . . . . . . . . 11 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧))
8 simpr 477 . . . . . . . . . . 11 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑦𝐴𝑧)
96, 7, 83jca 1242 . . . . . . . . . 10 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → (𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧))
10 simp2 1062 . . . . . . . . . 10 ((𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧) → (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧))
119, 10impbii 199 . . . . . . . . 9 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ↔ (𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧))
12 cotr2g.d . . . . . . . . . . . 12 dom 𝐵 ⊆ 𝐷
13 vex 3203 . . . . . . . . . . . . 13 𝑥 ∈ V
14 vex 3203 . . . . . . . . . . . . 13 𝑦 ∈ V
1513, 14breldm 5329 . . . . . . . . . . . 12 (𝑥𝐵𝑦 → 𝑥 ∈ dom 𝐵)
1612, 15sseldi 3601 . . . . . . . . . . 11 (𝑥𝐵𝑦 → 𝑥 ∈ 𝐷)
1716pm4.71ri 665 . . . . . . . . . 10 (𝑥𝐵𝑦 ↔ (𝑥 ∈ 𝐷 ∧ 𝑥𝐵𝑦))
18 cotr2g.e . . . . . . . . . . . 12 (ran 𝐵 ∩ dom 𝐴) ⊆ 𝐸
1913, 14brelrn 5356 . . . . . . . . . . . . 13 (𝑥𝐵𝑦 → 𝑦 ∈ ran 𝐵)
20 vex 3203 . . . . . . . . . . . . . 14 𝑧 ∈ V
2114, 20breldm 5329 . . . . . . . . . . . . 13 (𝑦𝐴𝑧 → 𝑦 ∈ dom 𝐴)
22 elin 3796 . . . . . . . . . . . . . 14 (𝑦 ∈ (ran 𝐵 ∩ dom 𝐴) ↔ (𝑦 ∈ ran 𝐵 ∧ 𝑦 ∈ dom 𝐴))
2322biimpri 218 . . . . . . . . . . . . 13 ((𝑦 ∈ ran 𝐵 ∧ 𝑦 ∈ dom 𝐴) → 𝑦 ∈ (ran 𝐵 ∩ dom 𝐴))
2419, 21, 23syl2an 494 . . . . . . . . . . . 12 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑦 ∈ (ran 𝐵 ∩ dom 𝐴))
2518, 24sseldi 3601 . . . . . . . . . . 11 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑦 ∈ 𝐸)
2625pm4.71ri 665 . . . . . . . . . 10 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ↔ (𝑦 ∈ 𝐸 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)))
27 cotr2g.f . . . . . . . . . . . 12 ran 𝐴 ⊆ 𝐹
2814, 20brelrn 5356 . . . . . . . . . . . 12 (𝑦𝐴𝑧 → 𝑧 ∈ ran 𝐴)
2927, 28sseldi 3601 . . . . . . . . . . 11 (𝑦𝐴𝑧 → 𝑧 ∈ 𝐹)
3029pm4.71ri 665 . . . . . . . . . 10 (𝑦𝐴𝑧 ↔ (𝑧 ∈ 𝐹 ∧ 𝑦𝐴𝑧))
3117, 26, 303anbi123i 1251 . . . . . . . . 9 ((𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑥𝐵𝑦) ∧ (𝑦 ∈ 𝐸 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)) ∧ (𝑧 ∈ 𝐹 ∧ 𝑦𝐴𝑧)))
32 3an6 1409 . . . . . . . . . 10 (((𝑥 ∈ 𝐷 ∧ 𝑥𝐵𝑦) ∧ (𝑦 ∈ 𝐸 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)) ∧ (𝑧 ∈ 𝐹 ∧ 𝑦𝐴𝑧)) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧)))
3310, 9impbii 199 . . . . . . . . . . 11 ((𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧) ↔ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧))
3433anbi2i 730 . . . . . . . . . 10 (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ∧ 𝑦𝐴𝑧)) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)))
3532, 34bitri 264 . . . . . . . . 9 (((𝑥 ∈ 𝐷 ∧ 𝑥𝐵𝑦) ∧ (𝑦 ∈ 𝐸 ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)) ∧ (𝑧 ∈ 𝐹 ∧ 𝑦𝐴𝑧)) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)))
3611, 31, 353bitri 286 . . . . . . . 8 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)))
3736imbi1i 339 . . . . . . 7 (((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)) → 𝑥𝐶𝑧))
38 impexp 462 . . . . . . 7 ((((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) ∧ (𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧)) → 𝑥𝐶𝑧) ↔ ((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))
39 3impexp 1289 . . . . . . 7 (((𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐸 ∧ 𝑧 ∈ 𝐹) → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ (𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
4037, 38, 393bitri 286 . . . . . 6 (((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ (𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
4140albii 1747 . . . . 5 (∀𝑧((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ ∀𝑧(𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
42412albii 1748 . . . 4 (∀𝑥∀𝑦∀𝑧((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ ∀𝑥∀𝑦∀𝑧(𝑥 ∈ 𝐷 → (𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
43 df-ral 2917 . . . 4 (∀𝑥 ∈ 𝐷 ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ ∀𝑥(𝑥 ∈ 𝐷 → ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))))
445, 42, 433bitr4i 292 . . 3 (∀𝑥∀𝑦∀𝑧((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ ∀𝑥 ∈ 𝐷 ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
45 df-ral 2917 . . . . . 6 (∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ ∀𝑦(𝑦 ∈ 𝐸 → ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
46 19.21v 1868 . . . . . . . 8 (∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ (𝑦 ∈ 𝐸 → ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
4746bicomi 214 . . . . . . 7 ((𝑦 ∈ 𝐸 → ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ ∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
4847albii 1747 . . . . . 6 (∀𝑦(𝑦 ∈ 𝐸 → ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
4945, 48bitri 264 . . . . 5 (∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))))
5049bicomi 214 . . . 4 (∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ ∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))
5150ralbii 2980 . . 3 (∀𝑥 ∈ 𝐷 ∀𝑦∀𝑧(𝑦 ∈ 𝐸 → (𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))) ↔ ∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))
5244, 51bitri 264 . 2 (∀𝑥∀𝑦∀𝑧((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ ∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))
53 df-ral 2917 . . . . 5 (∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧) ↔ ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)))
5453bicomi 214 . . . 4 (∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ ∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
5554ralbii 2980 . . 3 (∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ ∀𝑦 ∈ 𝐸 ∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
5655ralbii 2980 . 2 (∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧(𝑧 ∈ 𝐹 → ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧)) ↔ ∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
571, 52, 563bitri 286 1 ((𝐴 ∘ 𝐵) ⊆ 𝐶 ↔ ∀𝑥 ∈ 𝐷 ∀𝑦 ∈ 𝐸 ∀𝑧 ∈ 𝐹 ((𝑥𝐵𝑦 ∧ 𝑦𝐴𝑧) → 𝑥𝐶𝑧))
Colors of variables: wff setvar class
Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037  ∀wal 1481   ∈ wcel 1990  ∀wral 2912   ∩ cin 3573   ⊆ wss 3574   class class class wbr 4653  dom cdm 5114  ran crn 5115   ∘ ccom 5118
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125
This theorem is referenced by:  cotr2  13716
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