sxy 288 core/gps_math.c rcb->sxy = 0.0; sxy 317 core/gps_math.c rcb->sxy -= old_x*old_y; sxy 328 core/gps_math.c rcb->sxy += x*y; sxy 355 core/gps_math.c rcb->s = (rcb->n * rcb->sxy - rcb->sx * rcb->sy ) / det; sxy 356 core/gps_math.c rcb->t = (rcb->sxx*rcb->sy - rcb->sx * rcb->sxy) / det; sxy 65 core/gps_math.h double sxy;