Date: Jul 16, 2013 2:19 AM
Author: Albert D. Rich
Subject: Re: An independent integration test suite

On Monday, July 15, 2013 9:36:04 AM UTC-10, wrote:

> In order to ensure that the answers of the integration differ by no
> more than a constant I've been differencing the expected answer from
> the Axiom answer and then taking the derivative.
> One curious pattern is that your answers differ from Axiom's answers
> by non-zero constants. [...]

The first sentence above correctly asserts that it is ok for antiderivatives to differ by a constant. Yet, the second sentence finds it surprising that they do differ. So what is the problem?