A linear transformation
(1)
| |||
(2)
| |||
(3)
|
is said to be an orthogonal transformation if it satisfies the orthogonality condition
(4)
|
where Einstein summation has been used and is the Kronecker delta.
A linear transformation
(1)
| |||
(2)
| |||
(3)
|
is said to be an orthogonal transformation if it satisfies the orthogonality condition
(4)
|
where Einstein summation has been used and is the Kronecker delta.
Weisstein, Eric W. "Orthogonality Condition." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/OrthogonalityCondition.html