Look this schematic picture: S means source and can be a current source or a voltage source. C_1, C_2 and C_3 are linear components, can be resistor, capacitor and inductor. In the everycircuit, I tried set up all possible combination and the everycircuit denied some combinations, but, those denied combinations are displayed how possibles in the wiki page about RLC, RC, RL and LC circuits. So, my questions is: what combinations are really impossibles and what are possibles? And about the possibles, how are the EDO of this system? In other words, I want to write the voltage in function of the time and the current in function of the time for each possible case. I don't know do it.