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**VERSION>=22.02.2021**
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[[_TOC_]]
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# Introduction
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The number of self-consistent iterations till convergence strongly depends on the quality of the starting point: the closer the initial state to the solution, the fewer iterations there are to converge. W-SLDA Toolkit implements a mechanism supporting the derivation of good-quality initial states. Namely, one can use a lattice of lower resolution to generate an approximation of the solution and next interpolate to a larger/target lattice and use it as a starting point. The idea is presented in the figure below. The same mechanism can be used for testing the stability of results with respect to the lattice resolution.
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