Using Circular References in Excel for Cool Stuff

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Summary

This article explains how to use circular references in Excel intentionally instead of treating them as errors. It walks through iterative calculation settings, counters, checkboxes for start and reset control, growing arrays, and timers. It also shows how to build Jacobi and Gauss-Seidel style updates for simulations such as Game of Life, heat transfer, and pathfinding. The piece emphasizes how Excel evaluates formulas and how that affects step-by-step simulation behavior. The overall focus is on practical spreadsheet techniques for modeling and animation.

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