Description: Shifting a closed-below, open-above interval is one-to-one onto. (Contributed by Paul Chapman, 25-Mar-2008) (Proof shortened by Mario Carneiro, 1-Sep-2015)
Ref | Expression | ||
---|---|---|---|
Hypothesis | icoshftf1o.1 | |
|
Assertion | icoshftf1o | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | icoshftf1o.1 | |
|
2 | icoshft | |
|
3 | 2 | ralrimiv | |
4 | readdcl | |
|
5 | 4 | 3adant2 | |
6 | readdcl | |
|
7 | 6 | 3adant1 | |
8 | renegcl | |
|
9 | 8 | 3ad2ant3 | |
10 | icoshft | |
|
11 | 5 7 9 10 | syl3anc | |
12 | 11 | imp | |
13 | 7 | rexrd | |
14 | icossre | |
|
15 | 5 13 14 | syl2anc | |
16 | 15 | sselda | |
17 | 16 | recnd | |
18 | simpl3 | |
|
19 | 18 | recnd | |
20 | 17 19 | negsubd | |
21 | 5 | recnd | |
22 | simp3 | |
|
23 | 22 | recnd | |
24 | 21 23 | negsubd | |
25 | simp1 | |
|
26 | 25 | recnd | |
27 | 26 23 | pncand | |
28 | 24 27 | eqtrd | |
29 | 7 | recnd | |
30 | 29 23 | negsubd | |
31 | simp2 | |
|
32 | 31 | recnd | |
33 | 32 23 | pncand | |
34 | 30 33 | eqtrd | |
35 | 28 34 | oveq12d | |
36 | 35 | adantr | |
37 | 12 20 36 | 3eltr3d | |
38 | reueq | |
|
39 | 37 38 | sylib | |
40 | 16 | adantr | |
41 | 40 | recnd | |
42 | simpll3 | |
|
43 | 42 | recnd | |
44 | simpl1 | |
|
45 | simpl2 | |
|
46 | 45 | rexrd | |
47 | icossre | |
|
48 | 44 46 47 | syl2anc | |
49 | 48 | sselda | |
50 | 49 | recnd | |
51 | 41 43 50 | subadd2d | |
52 | eqcom | |
|
53 | eqcom | |
|
54 | 51 52 53 | 3bitr4g | |
55 | 54 | reubidva | |
56 | 39 55 | mpbid | |
57 | 56 | ralrimiva | |
58 | 1 | f1ompt | |
59 | 3 57 58 | sylanbrc | |