Description: Absolute value is nonnegative. (Contributed by Mario Carneiro, 29-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypothesis | abscld.1 | |- ( ph -> A e. CC ) |
|
Assertion | absge0d | |- ( ph -> 0 <_ ( abs ` A ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | abscld.1 | |- ( ph -> A e. CC ) |
|
2 | absge0 | |- ( A e. CC -> 0 <_ ( abs ` A ) ) |
|
3 | 1 2 | syl | |- ( ph -> 0 <_ ( abs ` A ) ) |