21. In roots of the characteristic polynomial of a linear system have negative real parts. 22. For small enough stresses, even non-linear systems can usually be assumed to be linear. 23. The view factors are used as coefficients in a linear system of rendering equations. 24. A small treatise teaching how to solve indeterminate linear systems with positive integral solutions. 25. Combined with calculus, linear algebra facilitates the solution of linear systems of differential equations. 26. Spectral transformations are specific for eigenvalue problems and have no analogs for linear systems . 27. The LINEAR system alone has discovered 138, 393 asteroids, as of 20 September 2013. 28. The reader may recall linear systems of equations from high school, they look like this: 29. A projective linear subspace of this projective space is called a linear system of divisors. 30. The theoretical basis for regime shifts has been developed from the mathematics of non-linear systems .
