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9/11/2014 1:37:57 PM

hi normal(1/(1-2*x) + x/ (1-x-x^2),expanded); 1/(1-2*x) + x/(1-x-x^2) => (1-3*x^2)/(1-3*x+x^2+2*x^3) how to do the reverse? dillogimp@gmail.com writes: > normal(1/(1-2*x) + x/ (1-x-x^2),expanded); > 1/(1-2*x) + x/(1-x-x^2) => (1-3*x^2)/(1-3*x+x^2+2*x^3) > how to do the reverse? convert(%,parfrac,x); -- Joe Riel ...

.... On 27.10.2014 18:32, {xmb} wrote: > ... > What a stupid question! Read http://www.catb.org/esr/faqs/smart-questions.html and Learn or Leave thank you _not_ for your useless text. if u want to help do so, u didnt. On Tue, 28 Oct 2014 07:42:00 -0700, {xmb} wrote: > thank you _not_ for your useless text. if u want to help do so, u didnt. Your question was unintelligible. The people in this group are very willing to help, in my experience. Your question just did not show the proper attitude or mental state to justify spending time answering. ...

What's better? use constant X=>(1,2); or use constant X=>[1,2]; On Sat, 8 Dec 2007 09:44:59 -0800 (PST), Victor Porton <porton@narod.ru> wrote: >What's better? > > use constant X=>(1,2); > >or > > use constant X=>[1,2]; What's better? my @x = (1,2); or my $x = [1,2]; Michele -- {$_=pack'B8'x25,unpack'A8'x32,$a^=sub{pop^pop}->(map substr (($a||=join'',map--$|x$_,(unpack'w',unpack'u','G^<R<Y]*YB=' ..'KYU;*EVH[.FHF2W+#"\Z*5TI/ER<Z`S(G.DZZ9OX0Z')=~/./g)x...

Bug or feature? Pls explain: /tmp $ env -i bash -c 'x=4;bash -c "echo x: /\$x/"' x: // /tmp $ env -i x=9 bash -c 'x=4;bash -c "echo x: /\$x/"' x: /4/ --snip ~ $ uname -r; echo $BASH_VERSION 2.6.27.41-170.2.117.fc10.i686 3.2.39(1)-release -- thx On 2010-05-15, Name withheld by request <anonb6e9@nyx3.nyx.net> wrote: > Bug or feature? Pls explain: > > /tmp $ env -i bash -c 'x=4;bash -c "echo x: /\$x/"' > x: // > /tmp $ env -i x=9 bash -c 'x=4;bash -c "echo x: /\...

Ex ~ $ printf "hi\n\n"|cat -A hi$ $ ~ $ x="$(printf "hi\n\n")" ~ $ printf "$x"|cat -A hi~ $ Why are the trailing '\n's not in "$x"? Is there any way to stop this, w/o using a tempfile? -- thanks! On 12/29/2013 11:34 PM, Name withheld by request wrote: > x="$(printf "hi\n\n")" x="$(printf "%s" "hi\n\n")" Best regards, Cyrus In article <bibnk6Ftcm6U1@mid.individual.net>, Cyrus Kriticos <cyrus.kriticos@googlemail.com> wrote: >...

On 4/16/10 at 5:53 AM, klaus.engel@tiscali.it (Klaus Engel) wrote: >I tried to simplify an awkward looking integral with "Mathematica 7" >using its "(Full)Simplify[...]" function. Unfortunately it failed to >do so, even though I know that this would be possible. I boiled down >the problem to the following very simple example ("f" is just a >generic, undefined function): The input >Integrate[2 f[x], {x, 0, 1}]/2 // FullSimplify >returns just the input >Integrate[2 f[x], {x, 0, 1}]/2 The problem is f is undefined. Consequen...

Dear group, I tried to simplify an awkward looking integral with "Mathematica 7" using its "(Full)Simplify[...]" function. Unfortunately it failed to do so, even though I know that this would be possible. I boiled down the problem to the following very simple example ("f" is just a generic, undefined function): The input Integrate[2 f[x], {x, 0, 1}]/2 // FullSimplify returns just the input Integrate[2 f[x], {x, 0, 1}]/2 (same result for "Simplify" instead of "FullSimplify"), i.e., Mathematica seems not...

I don't think you are overlooking anything. You could write specific transformation rules. But the Presentations package ($50) at my web site has a section called Student's Integral that allows the manipulation of single variable integrals before evaluation. It is mainly meant for teaching integration techniques, but could also be used for derivations in notebooks. You can do breakout of integrals, and also apply integration techniques such as performing operations on the integrand, change of variable, integration by parts and trigonometric substitution. After manipulation, i...

Hello, Exercise 0.2 (page 16) from "The Standard C Library" is: Create a program which contains this line x : ((struct x *)x)->x = x(5); An "easy" solution is given right at the bottom; but that is not the main focus here... I am interested in a solution where the ":" is part of an inline if... () ? : Thus the line will occur like this: ? x : ((struct x *)x)->x = x(5); Here is my attempt: #include <stdio.h> #include <stdlib.h> struct y { struct y *num; int a; }; struct x { struct y *x; }; #define x(num) (&(stru...

Hi everybody, I need to solve the Cauchy problem written in the title box ( I paste it here again ): 3*x''+(10^-3)*x'+123*x=2*cos(3*t); x=x(t);initial conditions x(0)=0 and x'(0)=0. I tried with Runge-Kutta method and it seems to work as the solution x(t) is the same that I can get solving the equation by myself. I need to know if it would be better another method (eventually multistep one) and why it would be better (please don't just tell me 'cause it's faster or so...I need to know the why too). As last thing I need to estimate the error committed with Runge...

hello all, i expected the following to functions to be the same. myShow1 x = show x myShow2 = \x -> show x but only the first one is accepted by hugs, the second one is refused: - Unresolved top-level overloading *** Binding : myShow1 *** Outstanding context : Show b can please anybody give a hint / link about the difference? why must the polymorphism be resolved in one case, and not in the other? thanks & regards, troedler "R. Troedler" <troedler@gmx.ch> escreveu na mensagem news:a9369198.0407160347.51af0715@posting.google.com... > hello all, > ...

TABLES: Parent p_id order info Child p_iD f_id transaction info RELATIONSHIP parent::p_id = child::f_id Scripted button creates a new child record and passes the parent::p_id to the child::f_id This works fine, and when changing views to the child layout - everything is there and in the correct places. However, the portal I have on the parent table (showing child fields) is blank - shows no lines. If I change the relationship to: parent::p_id X child::f_id the portal instantly shows all transactions regardless of the order id, not just those of the parent::p_id order...

undefined "Sankha Banerjee" <jume_sankha@yahoo.com> wrote in message news:ef1283b.-1@webx.raydaftYaTP... > undefined > do you mean to write F''(x)+3/8*(1-x^2)*lam^2*F(x)=0 or F''(x)+3/8*(1-x)*x*lam^2*F(x)=0 Nasser yes the first one:F''(x)+3/8*(1-x^2)*lam^2*F(x)=0 > and to find the eigen value lam and the eigen function subject to a orthogonal condition. Nasser Abbasi wrote: > > > > > "Sankha Banerjee" <jume_sankha@yahoo.com> wrote in message > news:ef1283b.-1@webx.raydaftYaTP...

Hi, I am trying to treat an environment variable as a python list - and I'm sure there must be a standard and simple way to do so. I know that the interpreter itself must use it (to process $PATH / %PATH%, etc) but I am not able to find a simple function to do so. os.environ['PATH'].split(os.sep) is wrong on Windows for the case when PATH="c:\\A;B";c:\\D; where there is a ';' embedded in the quoted path. Does anyone know of a simple way (addons ok) which would do it in a cross platform way? If not - I will roll my own. My search has shown that generally people ...

The CAS "simplifies" x^2-x-x^3 to -(x^3-x^2+x) (flag -114 clear). Is there a way to set it to simplify this to -x^3+x^2-x ? John Pressman wrote: > The CAS "simplifies" x^2-x-x^3 to -(x^3-x^2+x) (flag -114 clear). Is > there a way to set it to simplify this to -x^3+x^2-x ? FDISTRIB Regards, -- Beto Reply: Erase between the dot (inclusive) and the @. Responder: Borra la frase obvia y el punto previo. ...

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