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Description: Define the function relations class, i.e., the class of functions. Alternate definitions are dffunsALTV , ... , dffunsALTV5 . (Contributed by Peter Mazsa, 17-Jul-2021)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | df-funsALTV |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 0 | cfunsALTV | ||
| 1 | cfunss | ||
| 2 | crels | ||
| 3 | 1 2 | cin | |
| 4 | 0 3 | wceq |