Question: How to calculate the stability of a 2d approximation method, for example U i n+1 = - b*dt/dx*(U i n - U i-1 n )

How to calculate the stability of a 2d approximation method, for example Uin+1 = - b*dt/dx*(Uin - Ui-1n) + (1 + dt*a) Uin?

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