det               345 core/gps_math.c     double det;
det               350 core/gps_math.c     det = rcb->n*rcb->sxx - rcb->sx*rcb->sx;
det               353 core/gps_math.c     if (det==0.0) return;
det               355 core/gps_math.c     rcb->s = (rcb->n * rcb->sxy - rcb->sx * rcb->sy ) / det;
det               356 core/gps_math.c     rcb->t = (rcb->sxx*rcb->sy  - rcb->sx * rcb->sxy) / det;