Description: Extended real version of le0neg1 . (Contributed by Mario Carneiro, 9-Sep-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | xle0neg1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xr | |
|
2 | xleneg | |
|
3 | 1 2 | mpan2 | |
4 | xneg0 | |
|
5 | 4 | breq1i | |
6 | 3 5 | bitrdi | |