Beam theory: Torsion
Usage
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At first, we sample 
in the 
( is odd) equidistant points around 
:
![\[ f_k = f(x_k),\: x_k = x^*+kh,\: k=-\frac{N-1}{2},\dots,\frac{N-1}{2} \]](https://www.knowledgesharingcentre.com/wp-content/ql-cache/quicklatex.com-a0198aa34cb890df7867660b021fea76_l3.png "Rendered by QuickLaTeX.com")
where 
is some step.
Then we interpolate points 
by polynomial
(1) 
Its coefficients 
are found as a solution of system of linear equations:
(2) 
Here are references to existing equations: (1), (2).
Here is reference to non-existing equation (??).
Geometric & Motion Characteristics
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