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MaplePrimes Questions and Posts on MaplePrimes
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MaplePrimes  MaplePrimes Posts and Questions
http://www.mapleprimes.com/tags/MaplePrimes

Seeking for a question about a bouncing ball.
https://www.mapleprimes.com/questions/227765SeekingForAQuestionAboutABouncingBall?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p>Hi, <br>
<br>
does anyone remember of a recent question (maybe a post) about a bouncing ball over a hilly ground?<br>
I can't put the finger on it.<br>
<br>
TIA</p>
<p>Hi, <br />
<br />
does anyone remember of a recent question (maybe a post) about a bouncing ball over a hilly ground?<br />
I can't put the finger on it.<br />
<br />
TIA</p>
227765
Sat, 31 Aug 2019 15:11:39 Z
mmcdara
mmcdara

Membership Anniversary For Ten Years (10)
https://www.mapleprimes.com/posts/210963MembershipAnniversaryForTenYears10?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p style="textalign: center;"><span style="fontfamily:comic sans ms,cursive;"><span style="fontsize: 36px;"><strong>One decade on <span>MaplePrimes</span></strong></span></span><span style="fontfamily:georgia,serif;"> </span></p>
<p style="textalign: center;"><span style="fontfamily:comic sans ms,cursive;"><span style="fontsize: 20px;"><strong><span class="st">Always I Wish </span><span class="st">A Wonderful Year</span> In Mathematics <span class="st">As</span></strong></span></span><span style="fontsize:22px;"><strong><span class="st"> </span></strong></span><span style="fontsize:28px;"><strong><span class="st">Annus <em>mirabilis</em></span></strong></span></p>
<p style="textalign: center;"><span style="fontfamily:verdana,geneva,sansserif;"><em><strong><span style="fontsize: 10px;"><span class="st">Fereydoon Shekofte</span></span></strong></em></span></p>
<p style="textalign: center;"><span style="fontfamily:comic sans ms,cursive;"><span style="fontsize: 36px;"><strong>One decade on <span product="15">MaplePrimes</span></strong></span></span><span style="fontfamily:georgia,serif;"> </span></p>
<p style="textalign: center;"><span style="fontfamily:comic sans ms,cursive;"><span style="fontsize: 20px;"><strong><span class="st">Always I Wish </span><span class="st">A Wonderful Year</span> In Mathematics <span class="st">As</span></strong></span></span><span style="fontsize:22px;"><strong><span class="st"> </span></strong></span><span style="fontsize:28px;"><strong><span class="st">Annus <em>mirabilis</em></span></strong></span></p>
<p style="textalign: center;"><span style="fontfamily:verdana,geneva,sansserif;"><em><strong><span style="fontsize: 10px;"><span class="st">Fereydoon Shekofte</span></span></strong></em></span></p>
210963
Wed, 07 Aug 2019 17:54:47 Z
Fereydoon_Shekofte
Fereydoon_Shekofte

We’d Like Your Input!  Updates to FAQs
https://www.mapleprimes.com/maplesoftblog/210951WedLikeYourInputUpdatesToFAQs?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p style="marginleft:36.0pt;">We are currently in the process of updating the support FAQs at <a href="https://faq.maplesoft.com">https://faq.maplesoft.com</a>. We’ve been working on updating the existing content for clarity, and have added several new articles already.</p>
<p style="marginleft:36.0pt;"> </p>
<p style="marginleft:36.0pt;">The majority of our FAQs are from questions people ask us in Technical Support at <a href="support@maplesoft.com">support@maplesoft.com</a>, but we’d also like to like to add content from other sources.</p>
<p style="marginleft:36.0pt;">Since we have such a great community here at MaplePrimes, we wanted to reach out and ask if there are any articles or questions that you'd like to see added to our FAQ.</p>
<p style="marginleft:36.0pt;"> </p>
<p style="marginleft:36.0pt;">We look forward to hearing your feedback!</p>
<p style="marginleft:36.0pt;">We are currently in the process of updating the support FAQs at <a href="https://faq.maplesoft.com">https://faq.maplesoft.com</a>. We’ve been working on updating the existing content for clarity, and have added several new articles already.</p>
<p style="marginleft:36.0pt;"> </p>
<p style="marginleft:36.0pt;">The majority of our FAQs are from questions people ask us in Technical Support at <a href="support@maplesoft.com">support@maplesoft.com</a>, but we’d also like to like to add content from other sources.</p>
<p style="marginleft:36.0pt;">Since we have such a great community here at MaplePrimes, we wanted to reach out and ask if there are any articles or questions that you'd like to see added to our FAQ.</p>
<p style="marginleft:36.0pt;"> </p>
<p style="marginleft:36.0pt;">We look forward to hearing your feedback!</p>
210951
Fri, 02 Aug 2019 15:06:03 Z
TechnicalSupport
TechnicalSupport

How to solve system of PDEs in maple?
https://www.mapleprimes.com/questions/227589HowToSolveSystemOfPDEsInMaple?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p>I want to solve the following system using PDE Solve command but finding an error. Please help me in this regard. Thanks!<br>
</p>
<p> </p>
<p>restart; d1 := 1; d2 := 1; AA := 0.2e2; BB := 0.79e1; L := 1;<br>
with(PDEtools, casesplit, declare);<br>
PDE1 := diff(u(x, t), t) = d1*(diff(u(x, t), x, x))u(x, t)*v(x, t)^2+AA*(1u(x, t)); PDE2 := diff(v(x, t), t) = d1*(diff(v(x, t), x, x))+u(x, t)*v(x, t)^2BB*v(x, t);<br>
/ 2 \ <br>
d  d  2 <br>
PDE1 :=  u(x, t) =  u(x, t)  u(x, t) v(x, t) + 0.002<br>
dt  2  <br>
\ dx / </p>
<p>  0.002 u(x, t)<br>
/ 2 \ <br>
d  d  2<br>
PDE2 :=  v(x, t) =  v(x, t) + u(x, t) v(x, t) <br>
dt  2  <br>
\ dx / </p>
<p>  0.079 v(x, t)<br>
IBC1 := {u(0, t) = 1, u(1, t) = 1, u(x, 0) = 1(1/2)*sin(Pi*(xL)/(2*L))^100}; IBC2 := {v(0, t) = 0, v(1, t) = 0, v(x, 0) = (1/4)*sin(Pi*(xL)/(2*L))^100}; dys1 := {IBC1, IBC2, PDE1, PDE2};<br>
/ / 2 \ <br>
 d  d  2 <br>
dys1 := <  u(x, t) =  u(x, t)  u(x, t) v(x, t) + 0.002<br>
 dt  2  <br>
\ \ dx / </p>
<p>  0.002 u(x, t), </p>
<p> / 2 \ <br>
d  d  2 <br>
 v(x, t) =  v(x, t) + u(x, t) v(x, t)  0.079 v(x, t), <br>
dt  2  <br>
\ dx / </p>
<p> / 100<br>
 1 /1 \ <br>
< u(0, t) = 1, u(1, t) = 1, u(x, 0) = 1   sin Pi (x  1) <br>
 2 \2 / <br>
\ </p>
<p> \ <br>
 <br>
>, <br>
 <br>
/ </p>
<p> / 100\ <br>
 1 /1 \  <br>
< v(0, t) = 0, v(1, t) = 0, v(x, 0) =  sin Pi (x  1) ><br>
 4 \2 /  <br>
\ / </p>
<p> \ <br>
 <br>
><br>
 <br>
/ <br>
pds := pdsolve(dys1, numeric, time = t, range = 0 .. 1);<br>
Error, (in pdsolve) invalid input: `pdsolve/numeric` expects its 2nd argument, IBCs, to be of type {list, set}, but received time = t<br>
p1 := pds:plot(t = 0, numpoints = 50);</p>
<p>p2 := pds:plot(t = 1/8, numpoints = 50, color = blue);</p>
<p>p3 := pds:plot(t = 1/4, numpoints = 50, color = green);</p>
<p>plots[display]({p1, p2, p3});<br>
Error, `pds` does not evaluate to a module<br>
Error, `pds` does not evaluate to a module<br>
Error, `pds` does not evaluate to a module<br>
Error, (in plots:display) expecting plot structures but received: {p1, p2, p3}</p>
<p>I want to solve the following system using PDE Solve command but finding an error. Please help me in this regard. Thanks!<br />
</p>
<p> </p>
<p>restart; d1 := 1; d2 := 1; AA := 0.2e2; BB := 0.79e1; L := 1;<br />
with(PDEtools, casesplit, declare);<br />
PDE1 := diff(u(x, t), t) = d1*(diff(u(x, t), x, x))u(x, t)*v(x, t)^2+AA*(1u(x, t)); PDE2 := diff(v(x, t), t) = d1*(diff(v(x, t), x, x))+u(x, t)*v(x, t)^2BB*v(x, t);<br />
/ 2 \ <br />
d  d  2 <br />
PDE1 :=  u(x, t) =  u(x, t)  u(x, t) v(x, t) + 0.002<br />
dt  2  <br />
\ dx / </p>
<p>  0.002 u(x, t)<br />
/ 2 \ <br />
d  d  2<br />
PDE2 :=  v(x, t) =  v(x, t) + u(x, t) v(x, t) <br />
dt  2  <br />
\ dx / </p>
<p>  0.079 v(x, t)<br />
IBC1 := {u(0, t) = 1, u(1, t) = 1, u(x, 0) = 1(1/2)*sin(Pi*(xL)/(2*L))^100}; IBC2 := {v(0, t) = 0, v(1, t) = 0, v(x, 0) = (1/4)*sin(Pi*(xL)/(2*L))^100}; dys1 := {IBC1, IBC2, PDE1, PDE2};<br />
/ / 2 \ <br />
 d  d  2 <br />
dys1 := <  u(x, t) =  u(x, t)  u(x, t) v(x, t) + 0.002<br />
 dt  2  <br />
\ \ dx / </p>
<p>  0.002 u(x, t), </p>
<p> / 2 \ <br />
d  d  2 <br />
 v(x, t) =  v(x, t) + u(x, t) v(x, t)  0.079 v(x, t), <br />
dt  2  <br />
\ dx / </p>
<p> / 100<br />
 1 /1 \ <br />
< u(0, t) = 1, u(1, t) = 1, u(x, 0) = 1   sin Pi (x  1) <br />
 2 \2 / <br />
\ </p>
<p> \ <br />
 <br />
>, <br />
 <br />
/ </p>
<p> / 100\ <br />
 1 /1 \  <br />
< v(0, t) = 0, v(1, t) = 0, v(x, 0) =  sin Pi (x  1) ><br />
 4 \2 /  <br />
\ / </p>
<p> \ <br />
 <br />
><br />
 <br />
/ <br />
pds := pdsolve(dys1, numeric, time = t, range = 0 .. 1);<br />
Error, (in pdsolve) invalid input: `pdsolve/numeric` expects its 2nd argument, IBCs, to be of type {list, set}, but received time = t<br />
p1 := pds:plot(t = 0, numpoints = 50);</p>
<p>p2 := pds:plot(t = 1/8, numpoints = 50, color = blue);</p>
<p>p3 := pds:plot(t = 1/4, numpoints = 50, color = green);</p>
<p>plots[display]({p1, p2, p3});<br />
Error, `pds` does not evaluate to a module<br />
Error, `pds` does not evaluate to a module<br />
Error, `pds` does not evaluate to a module<br />
Error, (in plots:display) expecting plot structures but received: {p1, p2, p3}</p>
227589
Wed, 31 Jul 2019 09:07:44 Z
Hamid_Chohan
Hamid_Chohan

Source editing.
https://www.mapleprimes.com/questions/227412SourceEditing?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p>When writing a post on MaplePrimes it is possible to access the source code, which allows to introduce/edit many attributes. Is it possible to observe the source of another post?</p>
<p>When writing a post on MaplePrimes it is possible to access the source code, which allows to introduce/edit many attributes. Is it possible to observe the source of another post?</p>
227412
Fri, 05 Jul 2019 20:17:38 Z
Christian Wolinski
Christian Wolinski

A check on website functionality
https://www.mapleprimes.com/questions/227393ACheckOnWebsiteFunctionality?ref=Feed:MaplePrimes:Tagged With MaplePrimes
<p>Generally when I respond to questions on this site, I make sure that I tick the checkbox requesting that I get an email when updates are made to the thread.</p>
<p>I've just realised that I have been receiving no such updates for a week or so. Two possibilities</p>
<ol>
<li>Problem with Mapleprimes website, meaning that email updates aren't being generated/sent</li>
<li>Problem with my ISP</li>
</ol>
<p>Before I try investigating (2) above, I'd just like to know if anyone else has seen any issue which might be explained by (1) above</p>
<p>Generally when I respond to questions on this site, I make sure that I tick the checkbox requesting that I get an email when updates are made to the thread.</p>
<p>I've just realised that I have been receiving no such updates for a week or so. Two possibilities</p>
<ol>
<li>Problem with Mapleprimes website, meaning that email updates aren't being generated/sent</li>
<li>Problem with my ISP</li>
</ol>
<p>Before I try investigating (2) above, I'd just like to know if anyone else has seen any issue which might be explained by (1) above</p>
227393
Mon, 01 Jul 2019 22:12:45 Z
tomleslie
tomleslie