Description: A function F : J --> K from a compactly generated space is continuous iff for all compact spaces z and continuous g : z --> J , the composite F o. g : z --> K is continuous. (Contributed by Mario Carneiro, 21-Mar-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | kgencn2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | kgencn | |
|
2 | rncmp | |
|
3 | 2 | adantl | |
4 | simprr | |
|
5 | eqid | |
|
6 | eqid | |
|
7 | 5 6 | cnf | |
8 | frn | |
|
9 | 4 7 8 | 3syl | |
10 | toponuni | |
|
11 | 10 | ad3antrrr | |
12 | 9 11 | sseqtrrd | |
13 | vex | |
|
14 | 13 | rnex | |
15 | 14 | elpw | |
16 | 12 15 | sylibr | |
17 | oveq2 | |
|
18 | 17 | eleq1d | |
19 | reseq2 | |
|
20 | 17 | oveq1d | |
21 | 19 20 | eleq12d | |
22 | 18 21 | imbi12d | |
23 | 22 | rspcv | |
24 | 16 23 | syl | |
25 | 3 24 | mpid | |
26 | simplll | |
|
27 | ssidd | |
|
28 | cnrest2 | |
|
29 | 26 27 12 28 | syl3anc | |
30 | 4 29 | mpbid | |
31 | cnco | |
|
32 | 31 | ex | |
33 | 30 32 | syl | |
34 | ssid | |
|
35 | cores | |
|
36 | 34 35 | ax-mp | |
37 | 36 | eleq1i | |
38 | 33 37 | imbitrdi | |
39 | 25 38 | syld | |
40 | 39 | ralrimdvva | |
41 | oveq1 | |
|
42 | oveq1 | |
|
43 | 42 | eleq2d | |
44 | 41 43 | raleqbidv | |
45 | 44 | rspcv | |
46 | elpwi | |
|
47 | 46 | adantl | |
48 | 47 | resabs1d | |
49 | idcn | |
|
50 | 49 | ad3antrrr | |
51 | 10 | ad3antrrr | |
52 | 47 51 | sseqtrd | |
53 | 6 | cnrest | |
54 | 50 52 53 | syl2anc | |
55 | 48 54 | eqeltrrd | |
56 | coeq2 | |
|
57 | 56 | eleq1d | |
58 | 57 | rspcv | |
59 | 55 58 | syl | |
60 | coires1 | |
|
61 | 60 | eleq1i | |
62 | 59 61 | imbitrdi | |
63 | 45 62 | syl9r | |
64 | 63 | com23 | |
65 | 64 | ralrimdva | |
66 | 40 65 | impbid | |
67 | 66 | pm5.32da | |
68 | 1 67 | bitrd | |