# Linear Algebra Formulas

### In linear algebra and functional analysis a projection is a linear transformation p from a vector space to itself such that p 2 pthat is whenever p is applied twice to any value it gives the same result as if it were applied once it leaves its image unchanged.

**Linear algebra formulas**.
In the previous lesson on functions you learned how to find the slope and write an equation when given a function.
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This course covers matrix theory and linear algebra emphasizing topics useful in other disciplines such as physics economics and social sciences natural sciences and engineering.
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It parallels the combination of theory and applications in professor strangs textbook introduction to linear algebra.

Mit opencourseware is a free open publication of material from thousands of mit courses covering the entire mit curriculum. In the first chapter lang discusses the relation between the geometry and the algebra underlying the subject and gives concrete examples of the notions which appear later in the book. We are going to use this same skill when working with functions. This is a short text in linear algebra intended for a one term course. This is one of over 2200 courses on ocw.

Solving a linear function part 2. Find materials for this course in the pages linked along the left. Though abstract this definition of projection formalizes and generalizes the idea of graphical projection. Free math lessons and math homework help from basic math to algebra geometry and beyond. No enrollment or registration.

Linear functions are very much like linear equations the only difference is you are using function notation fx instead of y. Knowledge of linear algebra is a prerequisite for studying statistics machine learning computer graphics signal processing chemistry economics quantum mechanics and countless other applications. If you studied the writing equations unit you learned how to write equations given two points and given slope and a point. Linear algebra is the foundation of science and engineering.