http://www.mapleprimes.com/questions/127725-Multivariate-Polynomial-Equations en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Tue, 09 Jun 2026 16:20:14 GMT Tue, 09 Jun 2026 16:20:14 GMT The latest answers and comments added to the Question, multivariate polynomial equations http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/questions/127725-Multivariate-Polynomial-Equations http://www.mapleprimes.com/questions/127725-Multivariate-Polynomial-Equations?ref=Feed:MaplePrimes:multivariate polynomial equations:Comments#answer127773 <p>There are syntax mistakes(&gt;=5) in your code. For example, your system includes the undefined eq0.<br>Compare the code in my attached file with your code. Here is the solution of your corrected system, <br>which isn't a polynomial system, obtained with the DirectSearch package <br><a href="http://www.mapleprimes.com/posts/101374-DirectSearch-Optimization-Package-Version-2">http://www.mapleprimes.com/posts/101374-DirectSearch-Optimization-Package-Version-2</a>&nbsp; :</p> <p>[7.85496193261484*10^(-19), Vector(8, {(1) = -0.4017316108e-9, (2) = 0.1740724125e-10, (3) = -0.1147025077e-9,<br>&nbsp;(4) = 0.1075045285e-9, (5) = 0.1041660324e-9, (6) = 0.1632254667e-9, (7) = 0.2854305558e-9,<br>&nbsp;(8) = -0.6929121790e-9}), <br>[x1a = 16.9985473402166, x1c = 426.37991382456, x1e = 182.438040282466, x1r = 35.3956680705575, <br>x2a = 32.5802574719189, x2c = 961.935630682755, x2e = 389.619227494766, x2r = 72.7708821679721], 2633]<br>The fsolve command (without options) fails with this system in 8 unknowns.<br>Did you try to solve your optimization problem with the <a href='http://www.maplesoft.com/support/help/search.aspx?term=Optimization' target='_new'>?Optimization</a> package?<br>See&nbsp;<a href="/view.aspx?sf=127773/425145/system.mw">system.mw</a>&nbsp;&nbsp;for more details.</p> <p>There are syntax mistakes(&gt;=5) in your code. For example, your system includes the undefined eq0.<br>Compare the code in my attached file with your code. Here is the solution of your corrected system, <br>which isn't a polynomial system, obtained with the DirectSearch package <br><a href="http://www.mapleprimes.com/posts/101374-DirectSearch-Optimization-Package-Version-2">http://www.mapleprimes.com/posts/101374-DirectSearch-Optimization-Package-Version-2</a>&nbsp; :</p> <p>[7.85496193261484*10^(-19), Vector(8, {(1) = -0.4017316108e-9, (2) = 0.1740724125e-10, (3) = -0.1147025077e-9,<br>&nbsp;(4) = 0.1075045285e-9, (5) = 0.1041660324e-9, (6) = 0.1632254667e-9, (7) = 0.2854305558e-9,<br>&nbsp;(8) = -0.6929121790e-9}), <br>[x1a = 16.9985473402166, x1c = 426.37991382456, x1e = 182.438040282466, x1r = 35.3956680705575, <br>x2a = 32.5802574719189, x2c = 961.935630682755, x2e = 389.619227494766, x2r = 72.7708821679721], 2633]<br>The fsolve command (without options) fails with this system in 8 unknowns.<br>Did you try to solve your optimization problem with the <a href='http://www.maplesoft.com/support/help/search.aspx?term=Optimization' target='_new'>?Optimization</a> package?<br>See&nbsp;<a href="/view.aspx?sf=127773/425145/system.mw">system.mw</a>&nbsp;&nbsp;for more details.</p> 127773 Tue, 15 Nov 2011 20:53:15 Z Markiyan Hirnyk Markiyan Hirnyk