freeCodeCamp/guide/english/mathematics/linear-algebra/orthogonality/index.md

1.5 KiB

title
Orthogonality

Orthogonality

In mathematics and linear algebra, two vectors u and v are said to be orthogonal when their dot product is 0:
dot product
Orthogonality can be thought of as perpendicularity generalized to higher dimensional vector spaces, since the two are the same- they imply that a right angle is formed by the line, plane, or vector.

right angle

The following are all examples of orthogonality:

  1. If two vectors are perpendicular, that is, they meet or intersect at a right (90 degree) angle, they are orthogonal.
  2. Two vectors are orthogonal if their inner product (dot product) is equal to 0.
  3. Two vector subspaces A and B in V are orthogonal if every vector in V is orthogonal to every vector in B.

More Information:

  1. http://mathworld.wolfram.com/Orthogonal.html
  2. http://mathworld.wolfram.com/Perpendicular.html