Theorem refimssco 41215

Description: Reflexive relations are subsets of their self-composition. (Contributed by RP, 4-Aug-2020.)

Assertion

Ref	Expression
refimssco	⊢ (( I ↾ (dom 𝐴 ∪ ran 𝐴)) ⊆ 𝐴 → ◡𝐴 ⊆ ◡(𝐴 ∘ 𝐴))

Proof of Theorem refimssco

Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		breq2 5078	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑥 → (𝑥𝐴𝑧 ↔ 𝑥𝐴𝑥))
2		breq1 5077	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑥 → (𝑧𝐴𝑦 ↔ 𝑥𝐴𝑦))
3	1, 2	anbi12d 631	. . . . . . . . . 10 ⊢ (𝑧 = 𝑥 → ((𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦) ↔ (𝑥𝐴𝑥 ∧ 𝑥𝐴𝑦)))
4	3	biimprd 247	. . . . . . . . 9 ⊢ (𝑧 = 𝑥 → ((𝑥𝐴𝑥 ∧ 𝑥𝐴𝑦) → (𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
5	4	spimevw 1998	. . . . . . . 8 ⊢ ((𝑥𝐴𝑥 ∧ 𝑥𝐴𝑦) → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦))
6	5	ex 413	. . . . . . 7 ⊢ (𝑥𝐴𝑥 → (𝑥𝐴𝑦 → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
7	6	adantr 481	. . . . . 6 ⊢ ((𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦) → (𝑥𝐴𝑦 → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
8	7	com12 32	. . . . 5 ⊢ (𝑥𝐴𝑦 → ((𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦) → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
9	8	a2i 14	. . . 4 ⊢ ((𝑥𝐴𝑦 → (𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦)) → (𝑥𝐴𝑦 → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
10		19.37v 1995	. . . 4 ⊢ (∃𝑧(𝑥𝐴𝑦 → (𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)) ↔ (𝑥𝐴𝑦 → ∃𝑧(𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
11	9, 10	sylibr 233	. . 3 ⊢ ((𝑥𝐴𝑦 → (𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦)) → ∃𝑧(𝑥𝐴𝑦 → (𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
12	11	2alimi 1815	. 2 ⊢ (∀𝑥∀𝑦(𝑥𝐴𝑦 → (𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦)) → ∀𝑥∀𝑦∃𝑧(𝑥𝐴𝑦 → (𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
13		reflexg 41213	. 2 ⊢ (( I ↾ (dom 𝐴 ∪ ran 𝐴)) ⊆ 𝐴 ↔ ∀𝑥∀𝑦(𝑥𝐴𝑦 → (𝑥𝐴𝑥 ∧ 𝑦𝐴𝑦)))
14		cnvssco 41214	. 2 ⊢ (◡𝐴 ⊆ ◡(𝐴 ∘ 𝐴) ↔ ∀𝑥∀𝑦∃𝑧(𝑥𝐴𝑦 → (𝑥𝐴𝑧 ∧ 𝑧𝐴𝑦)))
15	12, 13, 14	3imtr4i 292	1 ⊢ (( I ↾ (dom 𝐴 ∪ ran 𝐴)) ⊆ 𝐴 → ◡𝐴 ⊆ ◡(𝐴 ∘ 𝐴))

Syntax hints:   → wi 4   ∧ wa 396  ∀wal 1537  ∃wex 1782   ∪ cun 3885   ⊆ wss 3887   class class class wbr 5074   I cid 5488  ^◡ccnv 5588  dom cdm 5589  ran crn 5590   ↾ cres 5591   ∘ ccom 5593

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-11 2154  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pr 5352

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-br 5075  df-opab 5137  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601

This theorem is referenced by: (None)