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| Mirrors > Home > ILE Home > Th. List > ffvelcdmd | Unicode version | ||
| Description: A function's value belongs to its codomain. (Contributed by Mario Carneiro, 29-Dec-2016.) |
| Ref | Expression |
|---|---|
| ffvelcdmd.1 |
|
| ffvelcdmd.2 |
|
| Ref | Expression |
|---|---|
| ffvelcdmd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ffvelcdmd.2 |
. 2
| |
| 2 | ffvelcdmd.1 |
. . 3
| |
| 3 | 2 | ffvelcdmda 5697 |
. 2
|
| 4 | 1, 3 | mpdan 421 |
1
|
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