RelIncreAcc

Relative Acceleration Increment

In the governing equation,

$$\mathbf{M\cdot\Delta{}A=R},$$

this converger tests the following ratio,

$$\mathbf{\dfrac{\left|\Delta{}A^k\right|_\infty}{\left|\sum_{i=0}^{k}\Delta{}A^i\right|_\infty}}\leqslant{}tol.$$

where $\mathbf{\Delta{}A^k}$ denotes the acceleration increment of the $k$-th iteration.