Metamath Proof Explorer
Description: An alternate function value belongs to the range of the function,
analogous to fvelrn . (Contributed by AV, 3-Sep-2022)
|
|
Ref |
Expression |
|
Assertion |
afv2elrn |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
fundmdfat |
|
2 |
|
dfatafv2rnb |
|
3 |
1 2
|
sylib |
|