MaplePrimes - Questions and Posts tagged with bug
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en-us2016 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemSat, 13 Feb 2016 08:50:28 GMTSat, 13 Feb 2016 08:50:28 GMTThe most recent questions and posts on MaplePrimes tagged with bughttp://www.mapleprimes.com/images/mapleprimeswhite.jpgMaplePrimes - Questions and Posts tagged with bug
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Series with equation number bug?
http://www.mapleprimes.com/questions/209239-Series-With-Equation-Number-Bug?ref=Feed:MaplePrimes:Tagged With bug
<p>Hi,</p>
<p>When I execute the command</p>
<blockquote>
<p>series(exp(x),x)</p>
</blockquote>
<p>and then refer to the equation in a new execution group using a equation label (CTRL-L on Windows), the equation is shown in Maple 18, but in Maple 2015 I get an error message: 'Error, missing operator or ';'. Using the % instead does work for both versions.</p>
<p>Is this intended behaviour or a bug in Maple 2015?</p>
<p>Thanks,</p>
<p>Bart</p><p>Hi,</p>
<p>When I execute the command</p>
<blockquote>
<p>series(exp(x),x)</p>
</blockquote>
<p>and then refer to the equation in a new execution group using a equation label (CTRL-L on Windows), the equation is shown in Maple 18, but in Maple 2015 I get an error message: 'Error, missing operator or ';'. Using the % instead does work for both versions.</p>
<p>Is this intended behaviour or a bug in Maple 2015?</p>
<p>Thanks,</p>
<p>Bart</p>209239Tue, 09 Feb 2016 10:20:00 ZBartBartSerious Maple2015 bug
http://www.mapleprimes.com/questions/208661-Serious-Maple2015-Bug-?ref=Feed:MaplePrimes:Tagged With bug
<p>in LinearAlgebra Eigenvectors calculation.</p>
<p><img src="https://d1b10bmlvqabco.cloudfront.net/attach/ia8agua2tcs4tf/ia7qgxeved06kc/ijnoh1445bi9/InertiaTensor.png" alt="Maple 2015 Error" width="773" height="612"></p>
<p> </p>
<p> </p>
<p>So the above output startled me. I have used the Maple Linear Algebra Eigenvalues, Eigenvectors commands many times with no problem. Can any one explain to me what is going on. The program correctly calculates the eigenvalues for the matrix which are all distinct for a real symmetric matrix, and thus should have three distinct non-zero eigenvectors, yet the eigenvectore command returns only zeros for the eigenvectors. I calculated an eigenvector by hand corresponding to the eigenvalue of 1 and obtained (1, -sqrt(2)/sqrt(3), -1/sqrt(3).</p>
<p> </p>
<p>So this is either a serious bug or I am going completely insane. </p><p>in LinearAlgebra Eigenvectors calculation.</p>
<p><img src="https://d1b10bmlvqabco.cloudfront.net/attach/ia8agua2tcs4tf/ia7qgxeved06kc/ijnoh1445bi9/InertiaTensor.png" alt="Maple 2015 Error" width="773" height="612"></p>
<p> </p>
<p> </p>
<p>So the above output startled me. I have used the Maple Linear Algebra Eigenvalues, Eigenvectors commands many times with no problem. Can any one explain to me what is going on. The program correctly calculates the eigenvalues for the matrix which are all distinct for a real symmetric matrix, and thus should have three distinct non-zero eigenvectors, yet the eigenvectore command returns only zeros for the eigenvectors. I calculated an eigenvector by hand corresponding to the eigenvalue of 1 and obtained (1, -sqrt(2)/sqrt(3), -1/sqrt(3).</p>
<p> </p>
<p>So this is either a serious bug or I am going completely insane. </p>208661Thu, 21 Jan 2016 03:14:50 ZmarkweitzmanmarkweitzmanProblem with sqrt in GRTensor
http://www.mapleprimes.com/questions/208592-Problem-With-Sqrt-In-GRTensor?ref=Feed:MaplePrimes:Tagged With bug
<p>Found a strange behaviour in Mapke 2015 of the <span style="text-decoration: underline;">sqrt-function</span> after loading the GRTensor package:</p>
<p>the square-root of a non-square integer, e.g. sqrt(5), does not terminate. 5^(1/2) instead works fine.</p>
<p>Can be reproduced with Maple 18, but not with Maple 11.</p>
<p>I consider this a <span style="text-decoration: underline;">serious bug,</span> as it makes any expressions containing such roots useless.</p>
<p>As it worked with Maple 11 I am inclined to see it as your fault.</p>
<p> </p><p>Found a strange behaviour in Mapke 2015 of the <span style="text-decoration: underline;">sqrt-function</span> after loading the GRTensor package:</p>
<p>the square-root of a non-square integer, e.g. sqrt(5), does not terminate. 5^(1/2) instead works fine.</p>
<p>Can be reproduced with Maple 18, but not with Maple 11.</p>
<p>I consider this a <span style="text-decoration: underline;">serious bug,</span> as it makes any expressions containing such roots useless.</p>
<p>As it worked with Maple 11 I am inclined to see it as your fault.</p>
<p> </p>208592Mon, 18 Jan 2016 21:39:33 ZwgrafwgrafComputation of radical ideal
http://www.mapleprimes.com/questions/207755-Computation-Of-Radical-Ideal-?ref=Feed:MaplePrimes:Tagged With bug
<p>In the running of an example I faced to computation of radical ideal of the following ideal:</p>
<p><-c*m*u+d*c*n+m*b*v+m*c*t></p>
<p> </p>
<p>I used from <strong>Radical</strong> command in <strong>PolynomialIdeals</strong> package. But I dno't now why it's computation is very hard and <span class="short_text"><span class="hps">Time-consuming</span></span>?</p>
<p>What I have to do? I think there is a bug, since this ideal is simple, a<span class="short_text"><span class="hps">pparently</span></span>.</p><p>In the running of an example I faced to computation of radical ideal of the following ideal:</p>
<p><-c*m*u+d*c*n+m*b*v+m*c*t></p>
<p> </p>
<p>I used from <strong>Radical</strong> command in <strong>PolynomialIdeals</strong> package. But I dno't now why it's computation is very hard and <span class="short_text"><span class="hps">Time-consuming</span></span>?</p>
<p>What I have to do? I think there is a bug, since this ideal is simple, a<span class="short_text"><span class="hps">pparently</span></span>.</p>207755Tue, 15 Dec 2015 22:09:33 ZMDDMDDStrange bugs of solve command
http://www.mapleprimes.com/questions/207525-Strange-Bugs-Of-Solve-Command?ref=Feed:MaplePrimes:Tagged With bug
<p>In Maple 2015.1 we have</p>
<p><strong>restart;</strong></p>
<p><strong>solve([sin(2*x)/cos(x+3*Pi/2)=1, x>-4*Pi, x<-5*Pi/2], x, allsolutions, explicit);</strong></p>
<p><strong>solve([sin(2*x)/cos(x+3*Pi/2)=1, x>0, x<2*Pi], x, allsolutions, explicit);</strong></p>
<p><strong><img src="/view.aspx?sf=207525_question/1.png" alt="" width="467" height="59"></strong></p>
<p> </p>
<p> </p>
<p>In the first example, the error message is not clear (actually there exists a unique root <strong>x=-11*Pi/3</strong>), in the second example, one root (<strong>x=5*Pi/3</strong>) is lost.</p>
<p> </p><p>In Maple 2015.1 we have</p>
<p><strong>restart;</strong></p>
<p><strong>solve([sin(2*x)/cos(x+3*Pi/2)=1, x>-4*Pi, x<-5*Pi/2], x, allsolutions, explicit);</strong></p>
<p><strong>solve([sin(2*x)/cos(x+3*Pi/2)=1, x>0, x<2*Pi], x, allsolutions, explicit);</strong></p>
<p><strong><img src="/view.aspx?sf=207525_question/1.png" alt="" width="467" height="59"></strong></p>
<p> </p>
<p> </p>
<p>In the first example, the error message is not clear (actually there exists a unique root <strong>x=-11*Pi/3</strong>), in the second example, one root (<strong>x=5*Pi/3</strong>) is lost.</p>
<p> </p>207525Mon, 07 Dec 2015 17:03:29 ZKitonumKitonumPossible Bug in Maple ?
http://www.mapleprimes.com/posts/201844-Possible-Bug-In-Maple-?ref=Feed:MaplePrimes:Tagged With bug
<p>Has anyone tried to run the following in Maple command-line mode (i.e. in terminal window, type "maple" to start it without the graphic interface),</p>
<p>"</p>
<p>expr1:=t1+t2+t3+t4+t5+t6+t7+t8+t9+t10+t11+t12+t13+t14+t15+t16+t17+t18+t19+t20+t21+t22+t0-t0+t23;<br>expr2:=t1+t2+t3+t4+t5+t6+t7+t8+t9+t10+t11+t12+t13+t14+t15+t16+t17+t18+t19+t20+t21+t22+t0-t0+t23;<br>print(expr1-expr2);</p>
<p>"</p>
<p>Surprisingly, I didn't get "0" with my Maple 17 (under Linux platform) or 18 (under Mac OSX platform). Can anyone help me confirm this?</p><p>Has anyone tried to run the following in Maple command-line mode (i.e. in terminal window, type "maple" to start it without the graphic interface),</p>
<p>"</p>
<p>expr1:=t1+t2+t3+t4+t5+t6+t7+t8+t9+t10+t11+t12+t13+t14+t15+t16+t17+t18+t19+t20+t21+t22+t0-t0+t23;<br />expr2:=t1+t2+t3+t4+t5+t6+t7+t8+t9+t10+t11+t12+t13+t14+t15+t16+t17+t18+t19+t20+t21+t22+t0-t0+t23;<br />print(expr1-expr2);</p>
<p>"</p>
<p>Surprisingly, I didn't get "0" with my Maple 17 (under Linux platform) or 18 (under Mac OSX platform). Can anyone help me confirm this?</p>201844Wed, 18 Nov 2015 04:18:11 Zcrazyeticrazyeti