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Mirrors > Home > ILE Home > Th. List > letrd | Unicode version |
Description: Transitive law deduction for 'less than or equal to'. (Contributed by NM, 20-May-2005.) |
Ref | Expression |
---|---|
ltd.1 | |
ltd.2 | |
letrd.3 | |
letrd.4 | |
letrd.5 |
Ref | Expression |
---|---|
letrd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | letrd.4 | . 2 | |
2 | letrd.5 | . 2 | |
3 | ltd.1 | . . 3 | |
4 | ltd.2 | . . 3 | |
5 | letrd.3 | . . 3 | |
6 | letr 7977 | . . 3 | |
7 | 3, 4, 5, 6 | syl3anc 1228 | . 2 |
8 | 1, 2, 7 | mp2and 430 | 1 |
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