**Subsections**

The second partial derivative of the dot product *δ*_{i} with respect to the orientational parameters
and
is

The second partial derivatives of the unit vector
with respect to the Euler angles are

The second partial derivatives of the unit vector
with respect to the Euler angles are

The second partial derivatives of the unit vector
with respect to the Euler angles are

The relax user manual (PDF), created 2019-06-14.