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integral interpretation

asked 2013-02-23 18:59:12 -0500

ajk_birdman gravatar image

updated 2013-02-23 19:03:58 -0500

I found an integral which sage doesn't much seem to like:

var('R, t') integral(((1/(Rt))exp(iRt)), t) it returns this: (essentially) (Ei(iRt))/R

But the two i's should just multiply out and the two R's simplify to 1. And what's 'E'? I realize the integral is divergent, and the indefinite serves my purposes, but I'm not quite sure what

Also, if anyone could point me to a thread on how to attach those nifty screenshot-like html images of a sage session (like those used in error reports, i have no idea what the right word is) into a text box like this, that would be be appreciated. Still new to computing.

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answered 2013-02-23 20:48:41 -0500

achrzesz gravatar image

updated 2013-02-23 20:56:23 -0500

Sage gives you the correct answer. You can check it for example in wolframalpha.

Ei

is the exponential integral (and not a product).

To obtain a better formatted code you can copy-paste your code,

mark it and use the 101... icon.

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Asked: 2013-02-23 18:59:12 -0500

Seen: 60 times

Last updated: Feb 23 '13