### some problem with determinant of a matrix

Publié :

**lun. févr. 18, 2019 10:12 am**Consider the following code

I get

Jose

Code : Tout sélectionner

```
m:=matrix[[0,0.425*v2,-0.425,0,0,-d5*l4+d5*l5,d5*l4*v5+d5*v5*l5],[0,0.425,0.425*v2,0,0,-d5*l4*v5-d5*v5*l5,-d5*l4+d5*l5],[0.425,0,0,-0.425*v2,d5*l4*l5*v5-d5*v5,0,0],[-2*v2,0,0,2,2*l4*l5*v5+2*v5,0,0],[0,-2*v2,-2,0,0,2*l4*v5-2*v5*l5,2*l4+2*l5],[0,2,-2*v2,0,0,-2*l4-2*l5,2*l4*v5-2*v5*l5],[-2,0,0,-2*v2,2*l4*l5-2,0,0]];
det(m);
```

*Error: Bad Argument Value*. I tried very hard to find out why this is happenning. So far I could not find the reason. The same matrix has a determinant in other computer algebra systems. If I replace the first row of the matrix by a zero row I get a determinant. I did not do more experiments to figure out the nature of this problem. But this is very peculiar. Any assistance is much appreciated.Jose