Metamath Proof Explorer


Theorem ledivmul2d

Description: 'Less than or equal to' relationship between division and multiplication. (Contributed by Mario Carneiro, 28-May-2016)

Ref Expression
Hypotheses ltmul1d.1 φ A
ltmul1d.2 φ B
ltmul1d.3 φ C +
Assertion ledivmul2d φ A C B A B C

Proof

Step Hyp Ref Expression
1 ltmul1d.1 φ A
2 ltmul1d.2 φ B
3 ltmul1d.3 φ C +
4 3 rpregt0d φ C 0 < C
5 ledivmul2 A B C 0 < C A C B A B C
6 1 2 4 5 syl3anc φ A C B A B C