public unsafe void BSolveUUnit(int col, double *c)
#endif
{
int i, k;
LP.Zero(c, size);
for (i = 0; ; i++)
{
if (Q[i] == col)
{
col = i;
break;
}
}
//c[col] = 1.0;
/*for (i = 0; i < size; i++)
* {
* c[i] = b[Q[i]]; // shuffle Q
* }*/
if (U[col * size + col] != 0)
{
c[col] = 1.0 / U[col * size + col];
for (i = col + 1; i < size; i++)
{
c[i] -= c[col] * U[col * size + i];
}
}
else
{
return;
}
//else c[col] = 0; // value underspecified
for (k = col + 1; k < size; k++)
{
if (U[k * size + k] != 0 && Math.Abs(c[k]) > 0.000001)
{
c[k] /= U[k * size + k];
for (i = k + 1; i < size; i++)
{
c[i] -= c[k] * U[k * size + i];
}
}
else
{
c[k] = 0; // value underspecified
}
}
}
