i let v0 = 0.616u + 0.291v - 0.135 let v1 = if 0 > v0 then 0 else v0

is there something 'less good' about:

    let v1  = if v0 < 0 then 0 else v0 

Is Yoda condition somehow better?

Shouldn't we write: Let v1 = max 0 v0