http://www.mapleprimes.com/questions/142560-Initial-Boundary-Conditions-Of-A-PDE en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Sat, 13 Jun 2026 22:52:00 GMT Sat, 13 Jun 2026 22:52:00 GMT The latest answers and comments added to the Question, Initial boundary conditions of a PDE http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/questions/142560-Initial-Boundary-Conditions-Of-A-PDE http://www.mapleprimes.com/questions/142560-Initial-Boundary-Conditions-Of-A-PDE?ref=Feed:MaplePrimes:Initial boundary conditions of a PDE:Comments#answer142592 <p>This is a bug in Maple 12. It has been corrected in later versions.</p> <p><a href="http://www.mapleprimes.com/posts/134942-Patching-Maple?submit=135014#comment135014">http://www.mapleprimes.com/posts/134942-Patching-Maple?submit=135014#comment135014</a></p> <p>A workaround is to add a harmless nonlinear term to the right hand side of the pde. By harmless I mean that it evaluates to zero inside the r-range. The following is perfectly fine:</p> <p>Enonlin := E+(0=T(r,t)^2*piecewise(r &lt; 0, 1, 0));</p> <p>This is a bug in Maple 12. It has been corrected in later versions.</p> <p><a href="http://www.mapleprimes.com/posts/134942-Patching-Maple?submit=135014#comment135014">http://www.mapleprimes.com/posts/134942-Patching-Maple?submit=135014#comment135014</a></p> <p>A workaround is to add a harmless nonlinear term to the right hand side of the pde. By harmless I mean that it evaluates to zero inside the r-range. The following is perfectly fine:</p> <p>Enonlin := E+(0=T(r,t)^2*piecewise(r &lt; 0, 1, 0));</p> 142592 Thu, 24 Jan 2013 21:23:23 Z Preben Alsholm Preben Alsholm