MaplePrimes - Newest Questions
http://www.mapleprimes.com/questions
en-us2019 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemThu, 17 Oct 2019 03:45:59 GMTThu, 17 Oct 2019 03:45:59 GMTThe questions most recently asked on MaplePrimeshttp://www.mapleprimes.com/images/mapleprimeswhite.jpgMaplePrimes - Newest Questions
http://www.mapleprimes.com/questions
simplification example
https://www.mapleprimes.com/questions/228080-Simplification-Example?ref=Feed:MaplePrimes:New%20Questions
<p>How could one simplify the following expression, preferably over <strong>z</strong> in large parts of the complex plane, and with few calls under different assumptions, and preferably gracefully.</p>
<pre>
expr := 2*Pi*(-z)^(1/2)-z^(1/2)*(2*ln(-z^(1/2))-ln(z));
</pre>
<p>How could one simplify the following expression, preferably over <strong>z</strong> in large parts of the complex plane, and with few calls under different assumptions, and preferably gracefully.</p>
<pre>
expr := 2*Pi*(-z)^(1/2)-z^(1/2)*(2*ln(-z^(1/2))-ln(z));
</pre>
228080Thu, 17 Oct 2019 01:39:17 ZaceracerLyapunov function
https://www.mapleprimes.com/questions/228079-Lyapunov-Function-?ref=Feed:MaplePrimes:New%20Questions
<p> Dear all</p>
<p>Is there a nice idea to determine the Lyapunov function of the following system</p>
<p><a href="/view.aspx?sf=228079_question/Lyapunov_function.mw">Lyapunov_function.mw</a></p>
<p>Some parameters used in the code:</p>
<p>b fixed parameter</p>
<p>a any parameter in R</p>
<p>Many thanks for your help</p>
<p> </p>
<p> </p>
<p> Dear all</p>
<p>Is there a nice idea to determine the Lyapunov function of the following system</p>
<p><a href="/view.aspx?sf=228079_question/Lyapunov_function.mw">Lyapunov_function.mw</a></p>
<p>Some parameters used in the code:</p>
<p>b fixed parameter</p>
<p>a any parameter in R</p>
<p>Many thanks for your help</p>
<p> </p>
<p> </p>
228079Wed, 16 Oct 2019 22:30:21 ZZeinebZeinebSockets package Command entanglement phenomena
https://www.mapleprimes.com/questions/228078-Sockets-Package-Command-Entanglement-Phenomena-?ref=Feed:MaplePrimes:New%20Questions
<p>I was trying to learn more about the commands in this package and found it to be someone non satisfying:<br>
<br>
<br>
</p>
<p><a href="/view.aspx?sf=228078_question/sockets_strangeness.mw">Download sockets_strangeness.mw</a></p>
<p> </p>
<p>I was trying to learn more about the commands in this package and found it to be someone non satisfying:<br>
<br>
<br>
</p>
<p><a href="/view.aspx?sf=228078_question/sockets_strangeness.mw">Download sockets_strangeness.mw</a></p>
<p> </p>
228078Wed, 16 Oct 2019 21:27:37 ZAdam LedgerAdam LedgerCan the electric field in this Maple application display contours rather than the arrows of a gradplot?
https://www.mapleprimes.com/questions/228077-Can-The-Electric-Field-In-This-Maple?ref=Feed:MaplePrimes:New%20Questions
<p><a href="https://www.maplesoft.com/applications/view.aspx?SID=3707">https://www.maplesoft.com/applications/view.aspx?SID=3707</a></p>
<p><a href="https://www.maplesoft.com/applications/view.aspx?SID=3707">https://www.maplesoft.com/applications/view.aspx?SID=3707</a></p>
228077Wed, 16 Oct 2019 15:24:12 ZEarlEarlWhy does this integral give undefined?
https://www.mapleprimes.com/questions/228076-Why-Does-This-Integral-Give-Undefined?ref=Feed:MaplePrimes:New%20Questions
<p>In the attached maple worksheet <a href="/view.aspx?sf=228076_question/integral.mw">integral.mw</a>, I am trying to compute an integral involving hyperbolic cosines. While not straightforward to compute, it should be completely well behaved at zero and both infinities as long as rho is real:</p>
<p><img height="56" src="/view.aspx?sf=228076_question/integral.png" width="312"></p>
<p>Much to my surprise, maple gives "undefined" as the answer, even if I attach an "assuming rho > 0" to make completely sure that the denominator never vanishes.</p>
<p>If I fix rho to 1 (or any other value) and compute the integral numerically, maple happily gives a numeric value. Moreover, I can scale the R, use the fact that the integrand is an even function of R, factor the denominator, and use partial fraction decomposition to transform it into the equivalent form<img height="109" src="/view.aspx?sf=228076_question/transformed-integral.png" width="505"></p>
<p>which maple integrates happily and gives a completely well-defined function in terms of polylogarithms, which agrees with the numeric answer.</p>
<p>Now, I am not expecting maple to just solve every integral I throw at it, but why does it give "undefined" as the answer to a completely well-defined integral?</p>
<p>In the attached maple worksheet <a href="/view.aspx?sf=228076_question/integral.mw">integral.mw</a>, I am trying to compute an integral involving hyperbolic cosines. While not straightforward to compute, it should be completely well behaved at zero and both infinities as long as rho is real:</p>
<p><img height="56" src="/view.aspx?sf=228076_question/integral.png" width="312"></p>
<p>Much to my surprise, maple gives "undefined" as the answer, even if I attach an "assuming rho > 0" to make completely sure that the denominator never vanishes.</p>
<p>If I fix rho to 1 (or any other value) and compute the integral numerically, maple happily gives a numeric value. Moreover, I can scale the R, use the fact that the integrand is an even function of R, factor the denominator, and use partial fraction decomposition to transform it into the equivalent form<img height="109" src="/view.aspx?sf=228076_question/transformed-integral.png" width="505"></p>
<p>which maple integrates happily and gives a completely well-defined function in terms of polylogarithms, which agrees with the numeric answer.</p>
<p>Now, I am not expecting maple to just solve every integral I throw at it, but why does it give "undefined" as the answer to a completely well-defined integral?</p>
228076Wed, 16 Oct 2019 14:55:37 Zaudunskaaudunska Convert to mpl
https://www.mapleprimes.com/questions/228075--Convert-To-Mpl?ref=Feed:MaplePrimes:New%20Questions
<p>Hello</p>
<p>I have maple code saved as a text file f.txt.</p>
<p>It resides here</p>
<p>mydd:=“C:/Users/User/Downloads/f.txt”</p>
<p>what is the most expedient way to convert to f.mpl ?</p>
<p>Hello</p>
<p>I have maple code saved as a text file f.txt.</p>
<p>It resides here</p>
<p>mydd:=“C:/Users/User/Downloads/f.txt”</p>
<p>what is the most expedient way to convert to f.mpl ?</p>
228075Wed, 16 Oct 2019 08:51:00 Zbrian bovrilbrian bovril