ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  relcoi1 GIF version

Theorem relcoi1 4869
Description: Composition with the identity relation restricted to a relation's field. (Contributed by FL, 8-May-2011.)
Assertion
Ref Expression
relcoi1 (Rel 𝑅 → (𝑅 ∘ ( I ↾ 𝑅)) = 𝑅)

Proof of Theorem relcoi1
StepHypRef Expression
1 relfld 4866 . . 3 (Rel 𝑅 𝑅 = (dom 𝑅 ∪ ran 𝑅))
2 resundi 4643 . . . . 5 ( I ↾ (dom 𝑅 ∪ ran 𝑅)) = (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))
3 coeq2 4512 . . . . 5 (( I ↾ (dom 𝑅 ∪ ran 𝑅)) = (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅)) → (𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))))
4 coundi 4842 . . . . . . 7 (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))) = ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅)))
5 resco 4845 . . . . . . . 8 ((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅))
6 coi1 4856 . . . . . . . . 9 (Rel 𝑅 → (𝑅 ∘ I ) = 𝑅)
7 reseq1 4624 . . . . . . . . . 10 ((𝑅 ∘ I ) = 𝑅 → ((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅))
8 resdm 4667 . . . . . . . . . . 11 (Rel 𝑅 → (𝑅 ↾ dom 𝑅) = 𝑅)
9 eqtr 2098 . . . . . . . . . . . . . 14 ((((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅) ∧ (𝑅 ↾ dom 𝑅) = 𝑅) → ((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅)
10 eqtr 2098 . . . . . . . . . . . . . . . . . 18 (((𝑅 ∘ ( I ↾ dom 𝑅)) = ((𝑅 ∘ I ) ↾ dom 𝑅) ∧ ((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅) → (𝑅 ∘ ( I ↾ dom 𝑅)) = 𝑅)
11 resco 4845 . . . . . . . . . . . . . . . . . . 19 ((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅))
12 uneq1 3119 . . . . . . . . . . . . . . . . . . 19 ((𝑅 ∘ ( I ↾ dom 𝑅)) = 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))))
13 reseq1 4624 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑅 ∘ I ) = 𝑅 → ((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅))
14 eqtr 2098 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑅 ∘ ( I ↾ ran 𝑅)) = ((𝑅 ∘ I ) ↾ ran 𝑅) ∧ ((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅)) → (𝑅 ∘ ( I ↾ ran 𝑅)) = (𝑅 ↾ ran 𝑅))
1514uneq2d 3126 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑅 ∘ ( I ↾ ran 𝑅)) = ((𝑅 ∘ I ) ↾ ran 𝑅) ∧ ((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅)) → (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)))
16 eqtr 2098 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) ∧ (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)))
17 resss 4653 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝑅 ↾ ran 𝑅) ⊆ 𝑅
18 ssequn2 3145 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑅 ↾ ran 𝑅) ⊆ 𝑅 ↔ (𝑅 ∪ (𝑅 ↾ ran 𝑅)) = 𝑅)
1917, 18mpbi 143 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (𝑅 ∪ (𝑅 ↾ ran 𝑅)) = 𝑅
206, 19syl6reqr 2132 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (Rel 𝑅 → (𝑅 ∪ (𝑅 ↾ ran 𝑅)) = (𝑅 ∘ I ))
21 eqeq1 2087 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)) → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ) ↔ (𝑅 ∪ (𝑅 ↾ ran 𝑅)) = (𝑅 ∘ I )))
2220, 21syl5ibr 154 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)) → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
2316, 22syl 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) ∧ (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅))) → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
2423ex 113 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)) → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
2524com3l 80 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ↾ ran 𝑅)) → (Rel 𝑅 → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
2615, 25syl 14 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑅 ∘ ( I ↾ ran 𝑅)) = ((𝑅 ∘ I ) ↾ ran 𝑅) ∧ ((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅)) → (Rel 𝑅 → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
2726ex 113 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑅 ∘ ( I ↾ ran 𝑅)) = ((𝑅 ∘ I ) ↾ ran 𝑅) → (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅) → (Rel 𝑅 → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
2827eqcoms 2084 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅)) → (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅) → (Rel 𝑅 → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
2928com3l 80 . . . . . . . . . . . . . . . . . . . . . 22 (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ↾ ran 𝑅) → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅)) → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
3013, 29syl 14 . . . . . . . . . . . . . . . . . . . . 21 ((𝑅 ∘ I ) = 𝑅 → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅)) → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
316, 30mpcom 36 . . . . . . . . . . . . . . . . . . . 20 (Rel 𝑅 → (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅)) → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
3231com3l 80 . . . . . . . . . . . . . . . . . . 19 (((𝑅 ∘ I ) ↾ ran 𝑅) = (𝑅 ∘ ( I ↾ ran 𝑅)) → (((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
3311, 12, 32mpsyl 64 . . . . . . . . . . . . . . . . . 18 ((𝑅 ∘ ( I ↾ dom 𝑅)) = 𝑅 → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
3410, 33syl 14 . . . . . . . . . . . . . . . . 17 (((𝑅 ∘ ( I ↾ dom 𝑅)) = ((𝑅 ∘ I ) ↾ dom 𝑅) ∧ ((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅) → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
3534ex 113 . . . . . . . . . . . . . . . 16 ((𝑅 ∘ ( I ↾ dom 𝑅)) = ((𝑅 ∘ I ) ↾ dom 𝑅) → (((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅 → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
3635eqcoms 2084 . . . . . . . . . . . . . . 15 (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → (((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅 → (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
3736com3l 80 . . . . . . . . . . . . . 14 (((𝑅 ∘ I ) ↾ dom 𝑅) = 𝑅 → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
389, 37syl 14 . . . . . . . . . . . . 13 ((((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅) ∧ (𝑅 ↾ dom 𝑅) = 𝑅) → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
3938ex 113 . . . . . . . . . . . 12 (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅) → ((𝑅 ↾ dom 𝑅) = 𝑅 → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
4039com3l 80 . . . . . . . . . . 11 ((𝑅 ↾ dom 𝑅) = 𝑅 → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅) → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))))
418, 40mpcom 36 . . . . . . . . . 10 (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ↾ dom 𝑅) → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
427, 41syl5com 29 . . . . . . . . 9 ((𝑅 ∘ I ) = 𝑅 → (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))))
436, 42mpcom 36 . . . . . . . 8 (Rel 𝑅 → (((𝑅 ∘ I ) ↾ dom 𝑅) = (𝑅 ∘ ( I ↾ dom 𝑅)) → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
445, 43mpi 15 . . . . . . 7 (Rel 𝑅 → ((𝑅 ∘ ( I ↾ dom 𝑅)) ∪ (𝑅 ∘ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))
454, 44syl5eq 2125 . . . . . 6 (Rel 𝑅 → (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))) = (𝑅 ∘ I ))
46 eqeq1 2087 . . . . . 6 ((𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))) → ((𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ I ) ↔ (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))) = (𝑅 ∘ I )))
4745, 46syl5ibr 154 . . . . 5 ((𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ (( I ↾ dom 𝑅) ∪ ( I ↾ ran 𝑅))) → (Rel 𝑅 → (𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ I )))
482, 3, 47mp2b 8 . . . 4 (Rel 𝑅 → (𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ I ))
49 reseq2 4625 . . . . . 6 ( 𝑅 = (dom 𝑅 ∪ ran 𝑅) → ( I ↾ 𝑅) = ( I ↾ (dom 𝑅 ∪ ran 𝑅)))
5049coeq2d 4516 . . . . 5 ( 𝑅 = (dom 𝑅 ∪ ran 𝑅) → (𝑅 ∘ ( I ↾ 𝑅)) = (𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))))
5150eqeq1d 2089 . . . 4 ( 𝑅 = (dom 𝑅 ∪ ran 𝑅) → ((𝑅 ∘ ( I ↾ 𝑅)) = (𝑅 ∘ I ) ↔ (𝑅 ∘ ( I ↾ (dom 𝑅 ∪ ran 𝑅))) = (𝑅 ∘ I )))
5248, 51syl5ibr 154 . . 3 ( 𝑅 = (dom 𝑅 ∪ ran 𝑅) → (Rel 𝑅 → (𝑅 ∘ ( I ↾ 𝑅)) = (𝑅 ∘ I )))
531, 52mpcom 36 . 2 (Rel 𝑅 → (𝑅 ∘ ( I ↾ 𝑅)) = (𝑅 ∘ I ))
5453, 6eqtrd 2113 1 (Rel 𝑅 → (𝑅 ∘ ( I ↾ 𝑅)) = 𝑅)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 102   = wceq 1284  cun 2971  wss 2973   cuni 3601   I cid 4043  dom cdm 4363  ran crn 4364  cres 4365  ccom 4367  Rel wrel 4368
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-sep 3896  ax-pow 3948  ax-pr 3964
This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-rex 2354  df-v 2603  df-un 2977  df-in 2979  df-ss 2986  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-br 3786  df-opab 3840  df-id 4048  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-rn 4374  df-res 4375
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator