Theorem cats1un 11306

Description: Express a word with an extra symbol as the union of the word and the new value. (Contributed by Mario Carneiro, 28-Feb-2016.)

Assertion

Ref	Expression
cats1un	⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩) = (𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩}))

Proof of Theorem cats1un

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ccatws1cl 11213	. . . . 5 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩) ∈ Word 𝑋)
2		wrdf 11123	. . . . 5 ⊢ ((𝐴 ++ ⟨“𝐵”⟩) ∈ Word 𝑋 → (𝐴 ++ ⟨“𝐵”⟩):(0..^(♯‘(𝐴 ++ ⟨“𝐵”⟩)))⟶𝑋)
3	1, 2	syl 14	. . . 4 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩):(0..^(♯‘(𝐴 ++ ⟨“𝐵”⟩)))⟶𝑋)
4		ccatws1leng 11215	. . . . . . 7 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (♯‘(𝐴 ++ ⟨“𝐵”⟩)) = ((♯‘𝐴) + 1))
5	4	oveq2d 6034	. . . . . 6 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (0..^(♯‘(𝐴 ++ ⟨“𝐵”⟩))) = (0..^((♯‘𝐴) + 1)))
6		lencl 11121	. . . . . . . . 9 ⊢ (𝐴 ∈ Word 𝑋 → (♯‘𝐴) ∈ ℕ0)
7		nn0uz 9791	. . . . . . . . 9 ⊢ ℕ0 = (ℤ≥‘0)
8	6, 7	eleqtrdi 2324	. . . . . . . 8 ⊢ (𝐴 ∈ Word 𝑋 → (♯‘𝐴) ∈ (ℤ≥‘0))
9		fzosplitsn 10479	. . . . . . . 8 ⊢ ((♯‘𝐴) ∈ (ℤ≥‘0) → (0..^((♯‘𝐴) + 1)) = ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
10	8, 9	syl 14	. . . . . . 7 ⊢ (𝐴 ∈ Word 𝑋 → (0..^((♯‘𝐴) + 1)) = ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
11	10	adantr 276	. . . . . 6 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (0..^((♯‘𝐴) + 1)) = ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
12	5, 11	eqtrd 2264	. . . . 5 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (0..^(♯‘(𝐴 ++ ⟨“𝐵”⟩))) = ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
13	12	feq2d 5470	. . . 4 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ++ ⟨“𝐵”⟩):(0..^(♯‘(𝐴 ++ ⟨“𝐵”⟩)))⟶𝑋 ↔ (𝐴 ++ ⟨“𝐵”⟩):((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)})⟶𝑋))
14	3, 13	mpbid 147	. . 3 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩):((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)})⟶𝑋)
15	14	ffnd 5483	. 2 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩) Fn ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
16		wrdf 11123	. . . . 5 ⊢ (𝐴 ∈ Word 𝑋 → 𝐴:(0..^(♯‘𝐴))⟶𝑋)
17	16	adantr 276	. . . 4 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → 𝐴:(0..^(♯‘𝐴))⟶𝑋)
18		eqid 2231	. . . . . 6 ⊢ {⟨(♯‘𝐴), 𝐵⟩} = {⟨(♯‘𝐴), 𝐵⟩}
19		fsng 5820	. . . . . 6 ⊢ (((♯‘𝐴) ∈ ℕ0 ∧ 𝐵 ∈ 𝑋) → ({⟨(♯‘𝐴), 𝐵⟩}:{(♯‘𝐴)}⟶{𝐵} ↔ {⟨(♯‘𝐴), 𝐵⟩} = {⟨(♯‘𝐴), 𝐵⟩}))
20	18, 19	mpbiri 168	. . . . 5 ⊢ (((♯‘𝐴) ∈ ℕ0 ∧ 𝐵 ∈ 𝑋) → {⟨(♯‘𝐴), 𝐵⟩}:{(♯‘𝐴)}⟶{𝐵})
21	6, 20	sylan 283	. . . 4 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → {⟨(♯‘𝐴), 𝐵⟩}:{(♯‘𝐴)}⟶{𝐵})
22		fzodisjsn 10419	. . . . 5 ⊢ ((0..^(♯‘𝐴)) ∩ {(♯‘𝐴)}) = ∅
23	22	a1i 9	. . . 4 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((0..^(♯‘𝐴)) ∩ {(♯‘𝐴)}) = ∅)
24		fun 5508	. . . 4 ⊢ (((𝐴:(0..^(♯‘𝐴))⟶𝑋 ∧ {⟨(♯‘𝐴), 𝐵⟩}:{(♯‘𝐴)}⟶{𝐵}) ∧ ((0..^(♯‘𝐴)) ∩ {(♯‘𝐴)}) = ∅) → (𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩}):((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)})⟶(𝑋 ∪ {𝐵}))
25	17, 21, 23, 24	syl21anc 1272	. . 3 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩}):((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)})⟶(𝑋 ∪ {𝐵}))
26	25	ffnd 5483	. 2 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩}) Fn ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}))
27		elun 3348	. . 3 ⊢ (𝑥 ∈ ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)}) ↔ (𝑥 ∈ (0..^(♯‘𝐴)) ∨ 𝑥 ∈ {(♯‘𝐴)}))
28		ccats1val1g 11220	. . . . . 6 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋 ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = (𝐴‘𝑥))
29	28	3expa 1229	. . . . 5 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = (𝐴‘𝑥))
30		vex 2805	. . . . . 6 ⊢ 𝑥 ∈ V
31		simpr 110	. . . . . . . 8 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → 𝑥 ∈ (0..^(♯‘𝐴)))
32		fzonel 10396	. . . . . . . 8 ⊢ ¬ (♯‘𝐴) ∈ (0..^(♯‘𝐴))
33		nelne2 2493	. . . . . . . 8 ⊢ ((𝑥 ∈ (0..^(♯‘𝐴)) ∧ ¬ (♯‘𝐴) ∈ (0..^(♯‘𝐴))) → 𝑥 ≠ (♯‘𝐴))
34	31, 32, 33	sylancl 413	. . . . . . 7 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → 𝑥 ≠ (♯‘𝐴))
35	34	necomd 2488	. . . . . 6 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → (♯‘𝐴) ≠ 𝑥)
36		fvunsng 5848	. . . . . 6 ⊢ ((𝑥 ∈ V ∧ (♯‘𝐴) ≠ 𝑥) → ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥) = (𝐴‘𝑥))
37	30, 35, 36	sylancr 414	. . . . 5 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥) = (𝐴‘𝑥))
38	29, 37	eqtr4d 2267	. . . 4 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ (0..^(♯‘𝐴))) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥))
39	6	elexd 2816	. . . . . . . . 9 ⊢ (𝐴 ∈ Word 𝑋 → (♯‘𝐴) ∈ V)
40	39	adantr 276	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (♯‘𝐴) ∈ V)
41		simpr 110	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → 𝐵 ∈ 𝑋)
42	17	fdmd 5489	. . . . . . . . . 10 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → dom 𝐴 = (0..^(♯‘𝐴)))
43	42	eleq2d 2301	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((♯‘𝐴) ∈ dom 𝐴 ↔ (♯‘𝐴) ∈ (0..^(♯‘𝐴))))
44	32, 43	mtbiri 681	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ¬ (♯‘𝐴) ∈ dom 𝐴)
45		fsnunfv 5855	. . . . . . . 8 ⊢ (((♯‘𝐴) ∈ V ∧ 𝐵 ∈ 𝑋 ∧ ¬ (♯‘𝐴) ∈ dom 𝐴) → ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘(♯‘𝐴)) = 𝐵)
46	40, 41, 44, 45	syl3anc 1273	. . . . . . 7 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘(♯‘𝐴)) = 𝐵)
47		simpl 109	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → 𝐴 ∈ Word 𝑋)
48		s1cl 11202	. . . . . . . . . 10 ⊢ (𝐵 ∈ 𝑋 → ⟨“𝐵”⟩ ∈ Word 𝑋)
49	48	adantl 277	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ⟨“𝐵”⟩ ∈ Word 𝑋)
50		s1leng 11205	. . . . . . . . . . . 12 ⊢ (𝐵 ∈ 𝑋 → (♯‘⟨“𝐵”⟩) = 1)
51		1nn 9154	. . . . . . . . . . . 12 ⊢ 1 ∈ ℕ
52	50, 51	eqeltrdi 2322	. . . . . . . . . . 11 ⊢ (𝐵 ∈ 𝑋 → (♯‘⟨“𝐵”⟩) ∈ ℕ)
53		lbfzo0 10420	. . . . . . . . . . 11 ⊢ (0 ∈ (0..^(♯‘⟨“𝐵”⟩)) ↔ (♯‘⟨“𝐵”⟩) ∈ ℕ)
54	52, 53	sylibr 134	. . . . . . . . . 10 ⊢ (𝐵 ∈ 𝑋 → 0 ∈ (0..^(♯‘⟨“𝐵”⟩)))
55	54	adantl 277	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → 0 ∈ (0..^(♯‘⟨“𝐵”⟩)))
56		ccatval3 11180	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ ⟨“𝐵”⟩ ∈ Word 𝑋 ∧ 0 ∈ (0..^(♯‘⟨“𝐵”⟩))) → ((𝐴 ++ ⟨“𝐵”⟩)‘(0 + (♯‘𝐴))) = (⟨“𝐵”⟩‘0))
57	47, 49, 55, 56	syl3anc 1273	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ++ ⟨“𝐵”⟩)‘(0 + (♯‘𝐴))) = (⟨“𝐵”⟩‘0))
58		s1fv 11207	. . . . . . . . 9 ⊢ (𝐵 ∈ 𝑋 → (⟨“𝐵”⟩‘0) = 𝐵)
59	58	adantl 277	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (⟨“𝐵”⟩‘0) = 𝐵)
60	57, 59	eqtrd 2264	. . . . . . 7 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ++ ⟨“𝐵”⟩)‘(0 + (♯‘𝐴))) = 𝐵)
61	6	adantr 276	. . . . . . . . . 10 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (♯‘𝐴) ∈ ℕ0)
62	61	nn0cnd 9457	. . . . . . . . 9 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (♯‘𝐴) ∈ ℂ)
63	62	addlidd 8329	. . . . . . . 8 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (0 + (♯‘𝐴)) = (♯‘𝐴))
64	63	fveq2d 5643	. . . . . . 7 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ++ ⟨“𝐵”⟩)‘(0 + (♯‘𝐴))) = ((𝐴 ++ ⟨“𝐵”⟩)‘(♯‘𝐴)))
65	46, 60, 64	3eqtr2rd 2271	. . . . . 6 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝐴 ++ ⟨“𝐵”⟩)‘(♯‘𝐴)) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘(♯‘𝐴)))
66		elsni 3687	. . . . . . . 8 ⊢ (𝑥 ∈ {(♯‘𝐴)} → 𝑥 = (♯‘𝐴))
67	66	fveq2d 5643	. . . . . . 7 ⊢ (𝑥 ∈ {(♯‘𝐴)} → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ++ ⟨“𝐵”⟩)‘(♯‘𝐴)))
68	66	fveq2d 5643	. . . . . . 7 ⊢ (𝑥 ∈ {(♯‘𝐴)} → ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘(♯‘𝐴)))
69	67, 68	eqeq12d 2246	. . . . . 6 ⊢ (𝑥 ∈ {(♯‘𝐴)} → (((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥) ↔ ((𝐴 ++ ⟨“𝐵”⟩)‘(♯‘𝐴)) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘(♯‘𝐴))))
70	65, 69	syl5ibrcom 157	. . . . 5 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑥 ∈ {(♯‘𝐴)} → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥)))
71	70	imp 124	. . . 4 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ {(♯‘𝐴)}) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥))
72	38, 71	jaodan 804	. . 3 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑥 ∈ (0..^(♯‘𝐴)) ∨ 𝑥 ∈ {(♯‘𝐴)})) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥))
73	27, 72	sylan2b 287	. 2 ⊢ (((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑥 ∈ ((0..^(♯‘𝐴)) ∪ {(♯‘𝐴)})) → ((𝐴 ++ ⟨“𝐵”⟩)‘𝑥) = ((𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩})‘𝑥))
74	15, 26, 73	eqfnfvd 5747	1 ⊢ ((𝐴 ∈ Word 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 ++ ⟨“𝐵”⟩) = (𝐴 ∪ {⟨(♯‘𝐴), 𝐵⟩}))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 104   ∨ wo 715   = wceq 1397   ∈ wcel 2202   ≠ wne 2402  Vcvv 2802   ∪ cun 3198   ∩ cin 3199  ∅c0 3494  {csn 3669  ⟨cop 3672  dom cdm 4725  ⟶wf 5322  ‘cfv 5326  (class class class)co 6018  0cc0 8032  1c1 8033   + caddc 8035  ℕcn 9143  ℕ₀cn0 9402  ℤ_≥cuz 9755  ..^cfzo 10377  ♯chash 11038  Word cword 11117   ++ cconcat 11171  ⟨“cs1 11196

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-iinf 4686  ax-cnex 8123  ax-resscn 8124  ax-1cn 8125  ax-1re 8126  ax-icn 8127  ax-addcl 8128  ax-addrcl 8129  ax-mulcl 8130  ax-addcom 8132  ax-addass 8134  ax-distr 8136  ax-i2m1 8137  ax-0lt1 8138  ax-0id 8140  ax-rnegex 8141  ax-cnre 8143  ax-pre-ltirr 8144  ax-pre-ltwlin 8145  ax-pre-lttrn 8146  ax-pre-apti 8147  ax-pre-ltadd 8148

This theorem depends on definitions:  df-bi 117  df-dc 842  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-if 3606  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-id 4390  df-iord 4463  df-on 4465  df-ilim 4466  df-suc 4468  df-iom 4689  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5971  df-ov 6021  df-oprab 6022  df-mpo 6023  df-1st 6303  df-2nd 6304  df-recs 6471  df-frec 6557  df-1o 6582  df-er 6702  df-en 6910  df-dom 6911  df-fin 6912  df-pnf 8216  df-mnf 8217  df-xr 8218  df-ltxr 8219  df-le 8220  df-sub 8352  df-neg 8353  df-inn 9144  df-n0 9403  df-z 9480  df-uz 9756  df-fz 10244  df-fzo 10378  df-ihash 11039  df-word 11118  df-concat 11172  df-s1 11197

This theorem is referenced by:  vdegp1aid  16171  vdegp1bid  16172