Hey everybody... Can someone explain how to change the variable you're taking aderivative with respect to. For example, in the problem i'mtrying to solve, we have a PDE in which we have time derivativesand we're trying to convert the time derivatives to derivativeswith respect to unitless time (=t) where is theangular frequency. We then see how the equation behaves as wevary . So we need to convert d/dt to d/d... Thanks in advance... Hey everybody... Can someone explain how to change the variable you're taking aderivative with respect to. For example, in the problem i'mtrying to solve, we have a PDE in which we have time derivativesand we're trying to convert the time derivatives to derivativeswith respect to unitless time (=t) where is theangular frequency. We then see how the equation behaves as wevary . So we need to convert d/dt to d/d... Thanks in advance...