of the polynomial, must be non-negative [...] of the polynomial, must be non-negative
modulo axes). negative [...] in negative direction.
of the master axis. SMC_BL_NEGATIVE [...] in negative direction [...] of the axis. SMC_BL_START_NEGATIVE
of the segment (non-negative [...] of the segment (non-negative
negative edge; value [...] negative edge; value
and negated imaginary part