Question

what is sign convention?

Answer 1

In physics, a sign convention is a choice of the physical significance ofsigns (plus or minus) for a set of quantities, in a case where the choice of sign is arbitrary. ... Sometimes, the term "sign convention" is used more broadly to include factors of i and 2π, rather than just choices of sign.

Answer 2

In physics, a sign convention is a choice of the physical significance ofsigns (plus or minus) for a set of quantities, in a case where the choice of sign is arbitrary.