Description: The currying of a two-argument function is continuous. (Contributed by Mario Carneiro, 23-Mar-2015)
Ref | Expression | ||
---|---|---|---|
Hypotheses | cnmpt2k.j | |
|
cnmpt2k.k | |
||
cnmpt2k.a | |
||
Assertion | cnmpt2k | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnmpt2k.j | |
|
2 | cnmpt2k.k | |
|
3 | cnmpt2k.a | |
|
4 | nfcv | |
|
5 | nfcv | |
|
6 | nfmpo2 | |
|
7 | nfcv | |
|
8 | 5 6 7 | nfov | |
9 | 4 8 | nfmpt | |
10 | nfcv | |
|
11 | nfcv | |
|
12 | nfmpo1 | |
|
13 | nfcv | |
|
14 | 11 12 13 | nfov | |
15 | nfcv | |
|
16 | oveq1 | |
|
17 | 14 15 16 | cbvmpt | |
18 | oveq2 | |
|
19 | 18 | mpteq2dv | |
20 | 17 19 | eqtrid | |
21 | 9 10 20 | cbvmpt | |
22 | simpr | |
|
23 | simplr | |
|
24 | txtopon | |
|
25 | 2 1 24 | syl2anc | |
26 | cntop2 | |
|
27 | 3 26 | syl | |
28 | toptopon2 | |
|
29 | 27 28 | sylib | |
30 | 1 2 3 | cnmptcom | |
31 | cnf2 | |
|
32 | 25 29 30 31 | syl3anc | |
33 | eqid | |
|
34 | 33 | fmpo | |
35 | 32 34 | sylibr | |
36 | 35 | r19.21bi | |
37 | 36 | r19.21bi | |
38 | 37 | an32s | |
39 | 33 | ovmpt4g | |
40 | 22 23 38 39 | syl3anc | |
41 | 40 | mpteq2dva | |
42 | 41 | mpteq2dva | |
43 | 21 42 | eqtrid | |
44 | eqid | |
|
45 | 44 | xkoinjcn | |
46 | 1 2 45 | syl2anc | |
47 | 32 | feqmptd | |
48 | 47 30 | eqeltrrd | |
49 | fveq2 | |
|
50 | df-ov | |
|
51 | 49 50 | eqtr4di | |
52 | 1 2 25 46 48 51 | cnmptk1 | |
53 | 43 52 | eqeltrrd | |