def xs(self, x0): '''(INTERNAL) Eta summation (C{float}). ''' return fdot3(self._ab, self._cy, self._shx, start=x0)
def ps(self, p0): '''(INTERNAL) P summation (C{float}). ''' return fdot3(self._pq, self._cy, self._chx, start=p0)
def qs(self, q0): '''(INTERNAL) Q summation (C{float}). ''' return fdot3(self._pq, self._sy, self._shx, start=q0)
def ys(self, y0): '''(INTERNAL) Ksi summation (C{float}). ''' return fdot3(self._ab, self._sy, self._chx, start=y0)