Description: No real equals minus infinity. (Contributed by Mario Carneiro, 28-May-2016)
Ref | Expression | ||
---|---|---|---|
Hypothesis | rexrd.1 | |- ( ph -> A e. RR ) |
|
Assertion | renemnfd | |- ( ph -> A =/= -oo ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexrd.1 | |- ( ph -> A e. RR ) |
|
2 | renemnf | |- ( A e. RR -> A =/= -oo ) |
|
3 | 1 2 | syl | |- ( ph -> A =/= -oo ) |