1 2 ln U _ 1 I _ 1 U _ 2 I _ 2 MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meGabaGacmGadiWaaiWabaabaiaafaaake aadaWcaaqaaiaaigdaaeaacaaIYaaaaiGacYgacaGGUbWaaSaaaeaa daadaaqaaiaadwfaaaWaaSbaaSqaaiaaigdaaeqaaOWaaWaaaeaaca WGjbaaamaaBaaaleaacaaIXaaabeaaaOqaamaamaaabaGaamyvaaaa daWgaaWcbaGaaGOmaaqabaGcdaadaaqaaiaadMeaaaWaaSbaaSqaai aaikdaaeqaaaaaaaa@4456@
Note – The imaginary part of the logarithm must be appropriately chosen.
Note – La partie imaginaire du logarithme doit être convenablement choisie.