I'm also wondering if the following behavior is right: ``` >>> Piecewise((1, x < 1), (2, Eq(x, 3) & (y < x)), (3, True)).integrate((x, 0, 3)) 7 >>> Piecewise((1, x < 1), (2, y < 3), (3, True)).integrate((x, 0, 3)) Piecewise((5, (y >= -oo) & (y < 3)), (7, True)) ```
In the first case, the 2nd condition depends on x and y whereas in the 2nd case it only depends on y...and in the first case since it depends on x and x's range for the 2nd expression is from 3 to 3 (zero width) it can't contribute to the integration. So is it right to ignore the value of y? And what if there were a DiracDelta function there instead of 2 and the integration went to 4 instead of 3...then there *would* be a contribution...but this is presently ignored by the current routine: ``` >>> integrate( Piecewise((DiracDelta(x),x<2),(0,True)), (x,-1,1)) 1 >>> integrate( Piecewise((DiracDelta(x),Eq(x,0)),(0,True)), (x,-1,1)) 0 ``` /c -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/f0588adf-0e7f-44fd-b880-d60795f5424c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
