The conjunction "if" is used a lot in scientific writing. I wonder if it is correct to replace it with "when" and/or "whenever".
For example, instead of writing:
(1) a · b = 0 if a, b are orthogonal.
(2) a · b = 0 whenever a, b are orthogonal.
(3) a · b = 0 when a, b are orthogonal.
I read sentences like (2) and (3) in many scientific articles, but they were not written by English speakers, so I am not sure if they are correct.