Nering on Linear Algebra
From Linear Algebra and Matrix Theory by Evar Nering, the introduction:
We try to describe intuitively what is meant by a linear system…
[If we know or assume that a system is linear, then:] If we know the outputs for a collection of different inuts, we know the outputs for all inputs that can be obtained by combining these inputs in various ways.
…
So many of the problems that we encounter are assumed to be linear problems and so many of the mathematical techniques developed are inherently linear… Potential theory, the theory of heat, and the theory of small vibrations of mechanical systems are examples of linear theories.
“different inuts”? Was there a typo in the book, or was this in the retyping?
That’s my fingers, sorry