Description: Define a function that gives the cluster points of a function. (Contributed by Jeff Hankins, 24-Nov-2009)
Ref | Expression | ||
---|---|---|---|
Assertion | df-fcf | |- fClusf = ( j e. Top , f e. U. ran Fil |-> ( g e. ( U. j ^m U. f ) |-> ( j fClus ( ( U. j FilMap g ) ` f ) ) ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
0 | cfcf | |- fClusf |
|
1 | vj | |- j |
|
2 | ctop | |- Top |
|
3 | vf | |- f |
|
4 | cfil | |- Fil |
|
5 | 4 | crn | |- ran Fil |
6 | 5 | cuni | |- U. ran Fil |
7 | vg | |- g |
|
8 | 1 | cv | |- j |
9 | 8 | cuni | |- U. j |
10 | cmap | |- ^m |
|
11 | 3 | cv | |- f |
12 | 11 | cuni | |- U. f |
13 | 9 12 10 | co | |- ( U. j ^m U. f ) |
14 | cfcls | |- fClus |
|
15 | cfm | |- FilMap |
|
16 | 7 | cv | |- g |
17 | 9 16 15 | co | |- ( U. j FilMap g ) |
18 | 11 17 | cfv | |- ( ( U. j FilMap g ) ` f ) |
19 | 8 18 14 | co | |- ( j fClus ( ( U. j FilMap g ) ` f ) ) |
20 | 7 13 19 | cmpt | |- ( g e. ( U. j ^m U. f ) |-> ( j fClus ( ( U. j FilMap g ) ` f ) ) ) |
21 | 1 3 2 6 20 | cmpo | |- ( j e. Top , f e. U. ran Fil |-> ( g e. ( U. j ^m U. f ) |-> ( j fClus ( ( U. j FilMap g ) ` f ) ) ) ) |
22 | 0 21 | wceq | |- fClusf = ( j e. Top , f e. U. ran Fil |-> ( g e. ( U. j ^m U. f ) |-> ( j fClus ( ( U. j FilMap g ) ` f ) ) ) ) |