- #1
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Does scale factor must be continuous(Con.) and differentiable (Diff.) ? Or can it be one of them or neither ? Physically one expects it to be Con. and Diff. but is there a more rigorous proof.
And as a separate question, if ##\dot{a}## is not continuous/differentiable in some case, does that mean ##a## is also not continuous ?
And as a separate question, if ##\dot{a}## is not continuous/differentiable in some case, does that mean ##a## is also not continuous ?