Re: Integrate[ 0.0*x, {x, 0, y}]
- To: mathgroup at smc.vnet.net
- Subject: [mg103036] Re: Integrate[ 0.0*x, {x, 0, y}]
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Fri, 4 Sep 2009 07:01:49 -0400 (EDT)
- References: <h7qemi$101$1@smc.vnet.net>
On 2009.09.04. 9:13, Nankyoku Ice wrote:
> Why does Integrate[ 0.0 * x, {x, 0, y}] yield 0.0*y^2, not 0 ?
>
In Mathematica, 0 denotes an exact zero. 0.0 denotes a number which has
a certain number of zero digits to the right of the decimal point
(Accuracy[0.0] to be exact), but is undetermined beyond that.
Here's the first introduction in the docs to exact vs approximate numbers:
http://reference.wolfram.com/mathematica/tutorial/ExactAndApproximateResults.html