[Date Index]
[Thread Index]
[Author Index]
Re: How if I want to assume that -------
*To*: mathgroup at smc.vnet.net
*Subject*: [mg64579] Re: [mg64550] How if I want to assume that -------
*From*: Bob Hanlon <hanlonr at cox.net>
*Date*: Thu, 23 Feb 2006 00:34:13 -0500 (EST)
*Reply-to*: hanlonr at cox.net
*Sender*: owner-wri-mathgroup at wolfram.com
Integrate[1/(x-y),{x,0,5}]
If[Re[y] >= 5 || Re[y] <= 0 || Im[y] != 0, Log[5 - y] - Log[-y], Integrate[1/(x -
y), {x, 0, 5},
Assumptions -> !(Re[y] >= 5 || Re[y] <= 0 || Im[y] != 0)]]
Simplify[%,{x>y,y>5}]
Log[(y - 5)/y]
Integrate[1/(x-y),{x,0,5},Assumptions->{x>y,y>5}]
Log[(y - 5)/y]
Assuming[{x>y,y>5},Integrate[1/(y-x),{x,0,5}]]
Log[y/(y - 5)]
Bob Hanlon
>
> From: kong dong <dkong at lnm.imech.ac.cn>
To: mathgroup at smc.vnet.net
> Subject: [mg64579] [mg64550] How if I want to assume that -------
>
> Thank you for your attention,
>
> Does there exist a 'assume' function in Mathematica?
> For example, I want to assume that
> { x>y }
>
> Thank you!
>
>
Prev by Date:
**finding the position of a pattern in list**
Next by Date:
**Re: Combining ContourPlot and Plot**
Previous by thread:
**Re: How if I want to assume that -------**
Next by thread:
**Combining ContourPlot and Plot**
| |