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crash and unstable number of solutions #72
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Thanks for reporting this issue. The blackbox solver (phc -b) uses default values for tolerances and numerical parameters. Those defaults work well for small and medium sized examples, but no longer for larger problems. Try to work with phc -u which offers a better path tracker. |
Hi professor, I have tried -u option several times. But it requires a lot of mathematics and ultimately I failed. By the way, if we want to interoperate with C/C++, how should we do? Thanks a lot and looking forward to your instructions! |
Hello,
I have to disturb you for a moment because phc -u needs many steps to perform
Could you please provide the operation steps for phc -u to ensure that these steps has the same effect with phc -b
And then I can try to input different parameters to test result.
Best regards and thank you for your powerful phc tool!
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发送时间: 2024年5月3日(星期五) 上午6:29
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主题: Re: [janverschelde/PHCpack] crash and unstable number of solutions (Issue #72)
Thanks for reporting this issue. The blackbox solver (phc -b) uses default values for tolerances and numerical parameters. Those defaults work well for small and medium sized examples, but no longer for larger problems.
Try to work with phc -u which offers a better path tracker.
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Reply to this email directly, view it on GitHub, or unsubscribe.
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|
input.txt
18
2m11+0m12+0m13+0m21+0m22+0m23+0m31+0m32+0m33+0x+0y+0z-2+2a1m11+a4m21+a5m31;
0m11+2m12+1m13+0m21+0m22+0m23+0m31+0m32+0m33+0x+0y+0z-0+2a1m12+a4m22+a5m32;
0m11+1m12+8m13+0m21+0m22+0m23+0m31+0m32+0m33-6x+0y+0z-0+2a1m13+a4m23+a5m33;
0m11+0m12+0m13+2m21+0m22+0m23+0m31+0m32+0m33+0x+0y+0z-0+2a2m21+a4m11+a6m31;
0m11+0m12+0m13+0m21+2m22+1m23+0m31+0m32+0m33+0x+0y+0z-2+2a2m22+a4m12+a6m32;
0m11+0m12+0m13+0m21+1m22+8m23+0m31+0m32+0m33+0x-6y+0z-1+2a2m23+a4m13+a6m33;
0m11+0m12+0m13+0m21+0m22+0m23+2m31+0m32+0m33+0x+0y+0z-0+2a3m31+a5m11+a6m21;
0m11+0m12+0m13+0m21+0m22+0m23+0m31+2m32+1m33+0x+0y+0z-1+2a3m32+a5m12+a6m22;
0m11+0m12+0m13+0m21+0m22+0m23+0m31+1m32+8m33+0x+0y-6z-2+2a3m33+a5m13+a6m23;
0m11+0m12-6m13+0m21+0m22+0m23+0m31+0m32+0m33+5x+0y+0z-0;
0m11+0m12+0m13+0m21+0m22-6m23+0m31+0m32+0m33+0x+5y+0z-0;
0m11+0m12+0m13+0m21+0m22+0m23+0m31+0m32-6m33+0x+0y+5z+1;
m11^2+m12^2+m13^2-1;
m21^2+m22^2+m23^2-1;
m31^2+m32^2+m33^2-1;
m11m21+m12m22+m13m23;
m11m31+m12m32+m13m33;
m21m31+m22m32+m23*m33;
1 save the above content as input.txt and use phc latest version
2 .\phc.exe -b -068717 input.txt output.txt
3.phc crashed
.\phc.exe -b -t8 -01 input.txt output.txt
it will give 1880 solutions
.\phc.exe -b -t8 -0100 input.txt output.txt
it will give 1876 solutions
Is there any way to provide stable and complete solutions? or provide warnings for unstable or random solutions.
Thanks!
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