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definite and indefinite Integrate

  • To: mathgroup at
  • Subject: [mg50428] definite and indefinite Integrate
  • From: Jun Yan <jyan at>
  • Date: Fri, 3 Sep 2004 03:35:23 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

This is a question from a beginner:

ff[z_] = 1/z + z^3
Integrate[ff[z], {z, y, y0}]
intff[z_] = Integrate[ff[z], z]
intff[y] - intff[y0]

I expected to get same results from line 2 and line 4. However, the output
from line 2 is very complicated, with an If which has Im(y) and Im(y0)
involved. The result I want is that from line 4. How can I modify line 2
so that it produces the same output as from line 4?



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