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Theorem dfrcl2 43656
Description: Reflexive closure of a relation as union with restricted identity relation. (Contributed by RP, 6-Jun-2020.)
Assertion
Ref Expression
dfrcl2 r* = (𝑥 ∈ V ↦ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))

Proof of Theorem dfrcl2
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 df-rcl 43655 . 2 r* = (𝑥 ∈ V ↦ {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)})
2 rabab 3475 . . . . . . . 8 {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} = {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)}
32eqcomi 2738 . . . . . . 7 {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} = {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)}
43inteqi 4910 . . . . . 6 {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} = {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)}
54a1i 11 . . . . 5 (𝑥 ∈ V → {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} = {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)})
6 vex 3448 . . . . . . . . . . 11 𝑥 ∈ V
76dmex 7865 . . . . . . . . . 10 dom 𝑥 ∈ V
86rnex 7866 . . . . . . . . . 10 ran 𝑥 ∈ V
97, 8unex 7700 . . . . . . . . 9 (dom 𝑥 ∪ ran 𝑥) ∈ V
10 resiexg 7868 . . . . . . . . 9 ((dom 𝑥 ∪ ran 𝑥) ∈ V → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∈ V)
119, 10ax-mp 5 . . . . . . . 8 ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∈ V
1211, 6unex 7700 . . . . . . 7 (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∈ V
1312a1i 11 . . . . . 6 (𝑥 ∈ V → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∈ V)
14 ssun2 4138 . . . . . . 7 𝑥 ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)
15 dmun 5864 . . . . . . . . . . . 12 dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) = (dom ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ dom 𝑥)
16 dmresi 6012 . . . . . . . . . . . . 13 dom ( I ↾ (dom 𝑥 ∪ ran 𝑥)) = (dom 𝑥 ∪ ran 𝑥)
1716uneq1i 4123 . . . . . . . . . . . 12 (dom ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ dom 𝑥) = ((dom 𝑥 ∪ ran 𝑥) ∪ dom 𝑥)
18 un23 4133 . . . . . . . . . . . . 13 ((dom 𝑥 ∪ ran 𝑥) ∪ dom 𝑥) = ((dom 𝑥 ∪ dom 𝑥) ∪ ran 𝑥)
19 unidm 4116 . . . . . . . . . . . . . 14 (dom 𝑥 ∪ dom 𝑥) = dom 𝑥
2019uneq1i 4123 . . . . . . . . . . . . 13 ((dom 𝑥 ∪ dom 𝑥) ∪ ran 𝑥) = (dom 𝑥 ∪ ran 𝑥)
2118, 20eqtri 2752 . . . . . . . . . . . 12 ((dom 𝑥 ∪ ran 𝑥) ∪ dom 𝑥) = (dom 𝑥 ∪ ran 𝑥)
2215, 17, 213eqtri 2756 . . . . . . . . . . 11 dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) = (dom 𝑥 ∪ ran 𝑥)
23 rnun 6106 . . . . . . . . . . . 12 ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) = (ran ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ ran 𝑥)
24 rnresi 6035 . . . . . . . . . . . . 13 ran ( I ↾ (dom 𝑥 ∪ ran 𝑥)) = (dom 𝑥 ∪ ran 𝑥)
2524uneq1i 4123 . . . . . . . . . . . 12 (ran ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ ran 𝑥) = ((dom 𝑥 ∪ ran 𝑥) ∪ ran 𝑥)
26 unass 4131 . . . . . . . . . . . . 13 ((dom 𝑥 ∪ ran 𝑥) ∪ ran 𝑥) = (dom 𝑥 ∪ (ran 𝑥 ∪ ran 𝑥))
27 unidm 4116 . . . . . . . . . . . . . 14 (ran 𝑥 ∪ ran 𝑥) = ran 𝑥
2827uneq2i 4124 . . . . . . . . . . . . 13 (dom 𝑥 ∪ (ran 𝑥 ∪ ran 𝑥)) = (dom 𝑥 ∪ ran 𝑥)
2926, 28eqtri 2752 . . . . . . . . . . . 12 ((dom 𝑥 ∪ ran 𝑥) ∪ ran 𝑥) = (dom 𝑥 ∪ ran 𝑥)
3023, 25, 293eqtri 2756 . . . . . . . . . . 11 ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) = (dom 𝑥 ∪ ran 𝑥)
3122, 30uneq12i 4125 . . . . . . . . . 10 (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)) = ((dom 𝑥 ∪ ran 𝑥) ∪ (dom 𝑥 ∪ ran 𝑥))
32 unidm 4116 . . . . . . . . . 10 ((dom 𝑥 ∪ ran 𝑥) ∪ (dom 𝑥 ∪ ran 𝑥)) = (dom 𝑥 ∪ ran 𝑥)
3331, 32eqtri 2752 . . . . . . . . 9 (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)) = (dom 𝑥 ∪ ran 𝑥)
3433reseq2i 5936 . . . . . . . 8 ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) = ( I ↾ (dom 𝑥 ∪ ran 𝑥))
35 ssun1 4137 . . . . . . . 8 ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)
3634, 35eqsstri 3990 . . . . . . 7 ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)
3714, 36pm3.2i 470 . . . . . 6 (𝑥 ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∧ ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
38 dmeq 5857 . . . . . . . . . . 11 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → dom 𝑧 = dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
39 rneq 5889 . . . . . . . . . . 11 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → ran 𝑧 = ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
4038, 39uneq12d 4128 . . . . . . . . . 10 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → (dom 𝑧 ∪ ran 𝑧) = (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)))
4140reseq2d 5939 . . . . . . . . 9 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → ( I ↾ (dom 𝑧 ∪ ran 𝑧)) = ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))))
42 id 22 . . . . . . . . 9 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → 𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
4341, 42sseq12d 3977 . . . . . . . 8 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → (( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧 ↔ ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥)))
4443cleq2lem 43590 . . . . . . 7 (𝑧 = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) → ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) ↔ (𝑥 ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∧ ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))))
4544intminss 4934 . . . . . 6 (((( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∈ V ∧ (𝑥 ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∧ ( I ↾ (dom (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ∪ ran (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))) → {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
4613, 37, 45sylancl 586 . . . . 5 (𝑥 ∈ V → {𝑧 ∈ V ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
475, 46eqsstrd 3978 . . . 4 (𝑥 ∈ V → {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} ⊆ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
48 dmss 5856 . . . . . . . . . . . . . . . 16 (𝑥𝑧 → dom 𝑥 ⊆ dom 𝑧)
49 rnss 5892 . . . . . . . . . . . . . . . 16 (𝑥𝑧 → ran 𝑥 ⊆ ran 𝑧)
50 unss12 4147 . . . . . . . . . . . . . . . 16 ((dom 𝑥 ⊆ dom 𝑧 ∧ ran 𝑥 ⊆ ran 𝑧) → (dom 𝑥 ∪ ran 𝑥) ⊆ (dom 𝑧 ∪ ran 𝑧))
5148, 49, 50syl2anc 584 . . . . . . . . . . . . . . 15 (𝑥𝑧 → (dom 𝑥 ∪ ran 𝑥) ⊆ (dom 𝑧 ∪ ran 𝑧))
52 dfss 3930 . . . . . . . . . . . . . . 15 ((dom 𝑥 ∪ ran 𝑥) ⊆ (dom 𝑧 ∪ ran 𝑧) ↔ (dom 𝑥 ∪ ran 𝑥) = ((dom 𝑥 ∪ ran 𝑥) ∩ (dom 𝑧 ∪ ran 𝑧)))
5351, 52sylib 218 . . . . . . . . . . . . . 14 (𝑥𝑧 → (dom 𝑥 ∪ ran 𝑥) = ((dom 𝑥 ∪ ran 𝑥) ∩ (dom 𝑧 ∪ ran 𝑧)))
54 incom 4168 . . . . . . . . . . . . . 14 ((dom 𝑥 ∪ ran 𝑥) ∩ (dom 𝑧 ∪ ran 𝑧)) = ((dom 𝑧 ∪ ran 𝑧) ∩ (dom 𝑥 ∪ ran 𝑥))
5553, 54eqtrdi 2780 . . . . . . . . . . . . 13 (𝑥𝑧 → (dom 𝑥 ∪ ran 𝑥) = ((dom 𝑧 ∪ ran 𝑧) ∩ (dom 𝑥 ∪ ran 𝑥)))
5655reseq2d 5939 . . . . . . . . . . . 12 (𝑥𝑧 → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) = ( I ↾ ((dom 𝑧 ∪ ran 𝑧) ∩ (dom 𝑥 ∪ ran 𝑥))))
57 resres 5952 . . . . . . . . . . . 12 (( I ↾ (dom 𝑧 ∪ ran 𝑧)) ↾ (dom 𝑥 ∪ ran 𝑥)) = ( I ↾ ((dom 𝑧 ∪ ran 𝑧) ∩ (dom 𝑥 ∪ ran 𝑥)))
5856, 57eqtr4di 2782 . . . . . . . . . . 11 (𝑥𝑧 → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) = (( I ↾ (dom 𝑧 ∪ ran 𝑧)) ↾ (dom 𝑥 ∪ ran 𝑥)))
59 resss 5961 . . . . . . . . . . . 12 (( I ↾ (dom 𝑧 ∪ ran 𝑧)) ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ ( I ↾ (dom 𝑧 ∪ ran 𝑧))
6059a1i 11 . . . . . . . . . . 11 (𝑥𝑧 → (( I ↾ (dom 𝑧 ∪ ran 𝑧)) ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ ( I ↾ (dom 𝑧 ∪ ran 𝑧)))
6158, 60eqsstrd 3978 . . . . . . . . . 10 (𝑥𝑧 → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ ( I ↾ (dom 𝑧 ∪ ran 𝑧)))
6261adantr 480 . . . . . . . . 9 ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ ( I ↾ (dom 𝑧 ∪ ran 𝑧)))
63 simpr 484 . . . . . . . . 9 ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)
6462, 63sstrd 3954 . . . . . . . 8 ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → ( I ↾ (dom 𝑥 ∪ ran 𝑥)) ⊆ 𝑧)
65 simpl 482 . . . . . . . 8 ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → 𝑥𝑧)
6664, 65unssd 4151 . . . . . . 7 ((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ 𝑧)
6766ax-gen 1795 . . . . . 6 𝑧((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ 𝑧)
6867a1i 11 . . . . 5 (𝑥 ∈ V → ∀𝑧((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ 𝑧))
69 ssintab 4925 . . . . 5 ((( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} ↔ ∀𝑧((𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧) → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ 𝑧))
7068, 69sylibr 234 . . . 4 (𝑥 ∈ V → (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥) ⊆ {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)})
7147, 70eqssd 3961 . . 3 (𝑥 ∈ V → {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)} = (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
7271mpteq2ia 5197 . 2 (𝑥 ∈ V ↦ {𝑧 ∣ (𝑥𝑧 ∧ ( I ↾ (dom 𝑧 ∪ ran 𝑧)) ⊆ 𝑧)}) = (𝑥 ∈ V ↦ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
731, 72eqtri 2752 1 r* = (𝑥 ∈ V ↦ (( I ↾ (dom 𝑥 ∪ ran 𝑥)) ∪ 𝑥))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wal 1538   = wceq 1540  wcel 2109  {cab 2707  {crab 3402  Vcvv 3444  cun 3909  cin 3910  wss 3911   cint 4906  cmpt 5183   I cid 5525  dom cdm 5631  ran crn 5632  cres 5633  r*crcl 43654
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-ral 3045  df-rex 3054  df-rab 3403  df-v 3446  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-int 4907  df-br 5103  df-opab 5165  df-mpt 5184  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-rcl 43655
This theorem is referenced by:  dfrcl3  43657
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