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Most systems are inherently nonlinear in nature, and hence nonlinear problems are studied in various fields such as engineering, biology, physics, mathematics, etc. Nonlinear systems are commonly approximated by linear equations since nonlinear dynamical equations are difficult to solve.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.