2elfz2melfz - Mathbox for Alexander van der Vekens

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Theorem 2elfz2melfz 47349

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 13419	. . . . 5 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℤ)
2		elfzel2 13417	. . . . . 6 ⊢ (𝐵 ∈ (0...𝑁) → 𝑁 ∈ ℤ)
3		elfzelz 13419	. . . . . 6 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ∈ ℤ)
4		simplr 768	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝐵 ∈ ℤ)
5		zsubcl 12509	. . . . . . . . . . 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 12577	. . . . . . . . 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 12467	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ)
10	9	ad2antrr 726	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → 𝑁 ∈ ℝ)
11		zaddcl 12507	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 + 𝐵) ∈ ℤ)
12	11	zred 12572	. . . . . . . . . . . . . 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 11721	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 < (𝐴 + 𝐵) ↔ (𝑁 − 𝑁) < ((𝐴 + 𝐵) − 𝑁)))
17		zre 12467	. . . . . . . . . . . . . 14 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ)
18	9, 17	anim12i 613	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ))
19		zre 12467	. . . . . . . . . . . . 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 11540	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℝ → (𝑁 − 𝑁) ∈ ℝ)
23	22	ad2antrr 726	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝐴 ∈ ℝ) → (𝑁 − 𝑁) ∈ ℝ)
24		readdcl 11084	. . . . . . . . . . . . . . . . 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 11540	. . . . . . . . . . . . 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 11196	. . . . . . . . . . . 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 12468	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
34	33	subidd 11455	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℤ → (𝑁 − 𝑁) = 0)
35	34	ad2antrr 726	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℤ ∧ 𝐵 ∈ ℤ) ∧ 𝐴 ∈ ℤ) → (𝑁 − 𝑁) = 0)
36		zcn 12468	. . . . . . . . . . . . . . 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 12468	. . . . . . . . . . . . . 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 11310	. . . . . . . . . . . . . . 15 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐴 + 𝐵) = (𝐵 + 𝐴))
45	44	oveq1d 7356	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐵) − 𝑁) = ((𝐵 + 𝐴) − 𝑁))
46		subsub3 11388	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐵 − (𝑁 − 𝐴)) = ((𝐵 + 𝐴) − 𝑁))
47	45, 46	eqtr4d 2769	. . . . . . . . . . . . 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 5099	. . . . . . . . . . 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 12476	. . . . . . . 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 13515	. . . 4 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℕ₀)
60	59	ad2antrr 726	. . 3 ⊢ (((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) ∧ 𝑁 < (𝐴 + 𝐵)) → 𝐴 ∈ ℕ₀)
61		elfzle2 13423	. . . . . . 7 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ≤ 𝑁)
62	61	adantl 481	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ≤ 𝑁)
63		elfzel2 13417	. . . . . . . . . 10 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℤ)
64	63	zcnd 12573	. . . . . . . . 9 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℂ)
65	1	zcnd 12573	. . . . . . . . 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 11364	. . . . . . 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 5114	. . . . 5 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ≤ ((𝑁 − 𝐴) + 𝐴))
71	3	zred 12572	. . . . . . 7 ⊢ (𝐵 ∈ (0...𝑁) → 𝐵 ∈ ℝ)
72	71	adantl 481	. . . . . 6 ⊢ ((𝐴 ∈ (0...𝑁) ∧ 𝐵 ∈ (0...𝑁)) → 𝐵 ∈ ℝ)
73	63	zred 12572	. . . . . . . 8 ⊢ (𝐴 ∈ (0...𝑁) → 𝑁 ∈ ℝ)
74	1	zred 12572	. . . . . . . 8 ⊢ (𝐴 ∈ (0...𝑁) → 𝐴 ∈ ℝ)
75	73, 74	resubcld 11540	. . . . . . 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 11711	. . . . 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 13513	. . 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 1541 ∈ wcel 2111 class class class wbr 5086 (class class class)co 7341 ℂcc 10999 ℝcr 11000 0cc0 11001 + caddc 11004 < clt 11141 ≤ cle 11142 − cmin 11339 ℕ₀cn0 12376 ℤcz 12463 ...cfz 13402

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-cnex 11057 ax-resscn 11058 ax-1cn 11059 ax-icn 11060 ax-addcl 11061 ax-addrcl 11062 ax-mulcl 11063 ax-mulrcl 11064 ax-mulcom 11065 ax-addass 11066 ax-mulass 11067 ax-distr 11068 ax-i2m1 11069 ax-1ne0 11070 ax-1rid 11071 ax-rnegex 11072 ax-rrecex 11073 ax-cnre 11074 ax-pre-lttri 11075 ax-pre-lttrn 11076 ax-pre-ltadd 11077 ax-pre-mulgt0 11078

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-1st 7916 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-er 8617 df-en 8865 df-dom 8866 df-sdom 8867 df-pnf 11143 df-mnf 11144 df-xr 11145 df-ltxr 11146 df-le 11147 df-sub 11341 df-neg 11342 df-nn 12121 df-n0 12377 df-z 12464 df-uz 12728 df-fz 13403

This theorem is referenced by: (None)

W3C validator