Recent content by EAAL

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Homework Statement Solve (Z+e^x)Z_x + (Z+e^y)Z_y = Z^2 - e^{x+y} Where Z = Z(x,y)Homework Equations Equations of the form PZ_x + QZ_y = R Where P = P(x,y,z) , Q=Q(x,y,z) , R=R(x,y,z) Are solved with the Lagrange method. It is possible to write this in the form: \frac{dx}{P} =...

I think that knowing the basics of logic is important. It let's you have a feel of how the premises can be used to get to the conclusion, by only taking "valid" steps. Of course, if you read lots of proofs, and practice reproducing them, and with other exercises, you get the feel for it, and...