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| Mirrors > Home > NFE Home > Th. List > df-ranfn | Unicode version | ||
| Description: Define the range function. This is a function wrapper for the range operator. (Contributed by Scott Fenton, 9-Aug-2019.) | 
| Ref | Expression | 
|---|---|
| df-ranfn | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | cranfn 5772 | 
. 2
 | |
| 2 | vx | 
. . 3
 | |
| 3 | cvv 2860 | 
. . 3
 | |
| 4 | 2 | cv 1641 | 
. . . 4
 | 
| 5 | 4 | crn 4774 | 
. . 3
 | 
| 6 | 2, 3, 5 | cmpt 5652 | 
. 2
 | 
| 7 | 1, 6 | wceq 1642 | 
1
 | 
| Colors of variables: wff setvar class | 
| This definition is referenced by: fvranfn 5870 ranfnex 5872 | 
| Copyright terms: Public domain | W3C validator |