2elfz2melfz - Mathbox for Alexander van der Vekens

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Theorem 2elfz2melfz 47319

Description: If the sum of two integers of a 0-based finite set of sequential integers is greater than the upper bound, the difference between one of the integers and the difference between the upper bound and the other integer is in the 0-based finite set of sequential integers with the first integer as upper bound. (Contributed by Alexander van der Vekens, 7-Apr-2018.) (Revised by Alexander van der Vekens, 31-May-2018.)

**Assertion**
Ref	Expression
2elfz2melfz	⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝑁 < (𝐴 + 𝐵) → (𝐵 − (𝑁 − 𝐴)) ∈ (0...𝐴)))

**Proof of Theorem 2elfz2melfz**
Step	Hyp	Ref	Expression
1		elfzelz 13485	. . . . 5 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℤ)
2		elfzel2 13483	. . . . . 6 ⊢ (𝐵 ∈ (0...𝑁) → 𝑁 ∈ ℤ)
3		elfzelz 13485	. . . . . 6 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ∈ ℤ)
4		simplr 768	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝐵 ∈ ℤ)
5		zsubcl 12575	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℤ ∧ 𝐴 ∈ ℤ) → (𝑁 − 𝐴) ∈ ℤ)
6	5	adantlr 715	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 − 𝐴) ∈ ℤ)
7	4, 6	zsubcld 12643	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝐵 − (𝑁 − 𝐴)) ∈ ℤ)
8	7	adantr 480	. . . . . . . 8 ⊢ ((((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) ∧ 𝑁 < (𝐴 + 𝐵)) → (𝐵 − (𝑁 − 𝐴)) ∈ ℤ)
9		zre 12533	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ)
10	9	ad2antrr 726	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝑁 ∈ ℝ)
11		zaddcl 12573	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 + 𝐵) ∈ ℤ)
12	11	zred 12638	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 + 𝐵) ∈ ℝ)
13	12	expcom 413	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℤ → (𝐴 ∈ ℤ → (𝐴 + 𝐵) ∈ ℝ))
14	13	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 ∈ ℤ → (𝐴 + 𝐵) ∈ ℝ))
15	14	imp 406	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝐴 + 𝐵) ∈ ℝ)
16	10, 15, 10	ltsub1d 11787	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 < (𝐴 + 𝐵) ↔ (𝑁 − 𝑁) < ((𝐴 + 𝐵) − 𝑁)))
17		zre 12533	. . . . . . . . . . . . . 14 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ)
18	9, 17	anim12i 613	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ))
19		zre 12533	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
20	18, 19	anim12i 613	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → ((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ))
21		id 22	. . . . . . . . . . . . . . 15 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℝ)
22	21, 21	resubcld 11606	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℝ → (𝑁 − 𝑁) ∈ ℝ)
23	22	ad2antrr 726	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → (𝑁 − 𝑁) ∈ ℝ)
24		readdcl 11151	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + 𝐵) ∈ ℝ)
25	24	expcom 413	. . . . . . . . . . . . . . . 16 ⊢ (𝐵 ∈ ℝ → (𝐴 ∈ ℝ → (𝐴 + 𝐵) ∈ ℝ))
26	25	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ∈ ℝ → (𝐴 + 𝐵) ∈ ℝ))
27	26	imp 406	. . . . . . . . . . . . . 14 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → (𝐴 + 𝐵) ∈ ℝ)
28		simpll 766	. . . . . . . . . . . . . 14 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → 𝑁 ∈ ℝ)
29	27, 28	resubcld 11606	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → ((𝐴 + 𝐵) − 𝑁) ∈ ℝ)
30	23, 29	jca 511	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → ((𝑁 − 𝑁) ∈ ℝ ∧ ((𝐴 + 𝐵) − 𝑁) ∈ ℝ))
31		ltle 11262	. . . . . . . . . . . 12 ⊢ (((𝑁 − 𝑁) ∈ ℝ ∧ ((𝐴 + 𝐵) − 𝑁) ∈ ℝ) → ((𝑁 − 𝑁) < ((𝐴 + 𝐵) − 𝑁) → (𝑁 − 𝑁) ≤ ((𝐴 + 𝐵) − 𝑁)))
32	20, 30, 31	3syl 18	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → ((𝑁 − 𝑁) < ((𝐴 + 𝐵) − 𝑁) → (𝑁 − 𝑁) ≤ ((𝐴 + 𝐵) − 𝑁)))
33		zcn 12534	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
34	33	subidd 11521	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℤ → (𝑁 − 𝑁) = 0)
35	34	ad2antrr 726	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 − 𝑁) = 0)
36		zcn 12534	. . . . . . . . . . . . . . 15 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℂ)
37	36	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) → 𝐵 ∈ ℂ)
38	37	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝐵 ∈ ℂ)
39	33	ad2antrr 726	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝑁 ∈ ℂ)
40		zcn 12534	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℂ)
41	40	adantl 481	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝐴 ∈ ℂ)
42		simp3 1138	. . . . . . . . . . . . . . . 16 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → 𝐴 ∈ ℂ)
43		simp1 1136	. . . . . . . . . . . . . . . 16 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → 𝐵 ∈ ℂ)
44	42, 43	addcomd 11376	. . . . . . . . . . . . . . 15 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐴 + 𝐵) = (𝐵 + 𝐴))
45	44	oveq1d 7402	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) − 𝑁) = ((𝐵 + 𝐴) − 𝑁))
46		subsub3 11454	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐵 − (𝑁 − 𝐴)) = ((𝐵 + 𝐴) − 𝑁))
47	45, 46	eqtr4d 2767	. . . . . . . . . . . . 13 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) − 𝑁) = (𝐵 − (𝑁 − 𝐴)))
48	38, 39, 41, 47	syl3anc 1373	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → ((𝐴 + 𝐵) − 𝑁) = (𝐵 − (𝑁 − 𝐴)))
49	35, 48	breq12d 5120	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → ((𝑁 − 𝑁) ≤ ((𝐴 + 𝐵) − 𝑁) ↔ 0 ≤ (𝐵 − (𝑁 − 𝐴))))
50	32, 49	sylibd 239	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → ((𝑁 − 𝑁) < ((𝐴 + 𝐵) − 𝑁) → 0 ≤ (𝐵 − (𝑁 − 𝐴))))
51	16, 50	sylbid 240	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 < (𝐴 + 𝐵) → 0 ≤ (𝐵 − (𝑁 − 𝐴))))
52	51	imp 406	. . . . . . . 8 ⊢ ((((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) ∧ 𝑁 < (𝐴 + 𝐵)) → 0 ≤ (𝐵 − (𝑁 − 𝐴)))
53		elnn0z 12542	. . . . . . . 8 ⊢ ((𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀ ↔ ((𝐵 − (𝑁 − 𝐴)) ∈ ℤ ∧ 0 ≤ (𝐵 − (𝑁 − 𝐴))))
54	8, 52, 53	sylanbrc 583	. . . . . . 7 ⊢ ((((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) ∧ 𝑁 < (𝐴 + 𝐵)) → (𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀)
55	54	exp31 419	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 ∈ ℤ → (𝑁 < (𝐴 + 𝐵) → (𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀)))
56	2, 3, 55	syl2anc 584	. . . . 5 ⊢ (𝐵 ∈ (0...𝑁) → (𝐴 ∈ ℤ → (𝑁 < (𝐴 + 𝐵) → (𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀)))
57	1, 56	mpan9 506	. . . 4 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝑁 < (𝐴 + 𝐵) → (𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀))
58	57	imp 406	. . 3 ⊢ (((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) ∧ 𝑁 < (𝐴 + 𝐵)) → (𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀)
59		elfznn0 13581	. . . 4 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℕ₀)
60	59	ad2antrr 726	. . 3 ⊢ (((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) ∧ 𝑁 < (𝐴 + 𝐵)) → 𝐴 ∈ ℕ₀)
61		elfzle2 13489	. . . . . . 7 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ≤ 𝑁)
62	61	adantl 481	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ≤ 𝑁)
63		elfzel2 13483	. . . . . . . . . 10 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℤ)
64	63	zcnd 12639	. . . . . . . . 9 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℂ)
65	1	zcnd 12639	. . . . . . . . 9 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℂ)
66	64, 65	jca 511	. . . . . . . 8 ⊢ (𝐴 ∈ (0...𝑁) → (𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ))
67	66	adantr 480	. . . . . . 7 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ))
68		npcan 11430	. . . . . . 7 ⊢ ((𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝑁 − 𝐴) + 𝐴) = 𝑁)
69	67, 68	syl 17	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → ((𝑁 − 𝐴) + 𝐴) = 𝑁)
70	62, 69	breqtrrd 5135	. . . . 5 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ≤ ((𝑁 − 𝐴) + 𝐴))
71	3	zred 12638	. . . . . . 7 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ∈ ℝ)
72	71	adantl 481	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ∈ ℝ)
73	63	zred 12638	. . . . . . . 8 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℝ)
74	1	zred 12638	. . . . . . . 8 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℝ)
75	73, 74	resubcld 11606	. . . . . . 7 ⊢ (𝐴 ∈ (0...𝑁) → (𝑁 − 𝐴) ∈ ℝ)
76	75	adantr 480	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝑁 − 𝐴) ∈ ℝ)
77	74	adantr 480	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐴 ∈ ℝ)
78	72, 76, 77	lesubadd2d 11777	. . . . 5 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → ((𝐵 − (𝑁 − 𝐴)) ≤ 𝐴 ↔ 𝐵 ≤ ((𝑁 − 𝐴) + 𝐴)))
79	70, 78	mpbird 257	. . . 4 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝐵 − (𝑁 − 𝐴)) ≤ 𝐴)
80	79	adantr 480	. . 3 ⊢ (((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) ∧ 𝑁 < (𝐴 + 𝐵)) → (𝐵 − (𝑁 − 𝐴)) ≤ 𝐴)
81		elfz2nn0 13579	. . 3 ⊢ ((𝐵 − (𝑁 − 𝐴)) ∈ (0...𝐴) ↔ ((𝐵 − (𝑁 − 𝐴)) ∈ ℕ₀ ∧ 𝐴 ∈ ℕ₀ ∧ (𝐵 − (𝑁 − 𝐴)) ≤ 𝐴))
82	58, 60, 80, 81	syl3anbrc 1344	. 2 ⊢ (((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) ∧ 𝑁 < (𝐴 + 𝐵)) → (𝐵 − (𝑁 − 𝐴)) ∈ (0...𝐴))
83	82	ex 412	1 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → (𝑁 < (𝐴 + 𝐵) → (𝐵 − (𝑁 − 𝐴)) ∈ (0...𝐴)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 class class class wbr 5107 (class class class)co 7387 ℂcc 11066 ℝcr 11067 0cc0 11068 + caddc 11071 < clt 11208 ≤ cle 11209 − cmin 11405 ℕ₀cn0 12442 ℤcz 12529 ...cfz 13468

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 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-n0 12443 df-z 12530 df-uz 12794 df-fz 13469

This theorem is referenced by: (None)

W3C validator