Skip to main content

Timeline for Principal value of integral

Current License: CC BY-SA 3.0

14 events
when toggle format what by license comment
Jul 17, 2013 at 6:49 answer added Zurab Silagadze timeline score: 0
S May 15, 2013 at 11:00 vote accept Mark
May 15, 2013 at 11:00 vote accept Mark
S May 15, 2013 at 11:00
May 14, 2013 at 19:37 vote accept Mark
May 15, 2013 at 11:00
May 14, 2013 at 16:42 answer added Gerald Edgar timeline score: 5
May 14, 2013 at 14:28 comment added Carlo Beenakker @Gerald: it is equivalent to the textbook definition ${\cal P}\int_a^b dx f(x)=\frac{1}{2} \lim_{\epsilon\rightarrow 0}\left(\int_{a-i\epsilon}^{b-i\epsilon} dx f(x)+ \int_{a+i\epsilon}^{b+i\epsilon} dx f(x)\right)$
May 14, 2013 at 14:22 comment added Gerald Edgar @Carlo: that is perhaps a sensible definition. Can you cite a textbook that uses that definition?
May 14, 2013 at 14:04 answer added Carlo Beenakker timeline score: 4
May 14, 2013 at 13:59 comment added user25199 Numerically I find 1.57 - suspiciously close to $\pi/2$.
May 14, 2013 at 13:12 comment added Carlo Beenakker I would presume each pole at $x_n=n\pi$ is excluded in an interval $(x_n-\epsilon,x_n+\epsilon)$, and then the limit $\epsilon\rightarrow 0$ is taken.
May 14, 2013 at 12:18 comment added Gerald Edgar Since there are multiple poles, I do not know what "principal value" means. Perhaps you can provide a definition?
May 14, 2013 at 7:52 comment added Mark @user11000: math.stackexchange.com/questions/384291/…
May 14, 2013 at 7:44 comment added user11000 @Mark: Could you link the corresponding math.stackexchange post? Thanks.
May 14, 2013 at 6:46 history asked Mark CC BY-SA 3.0