AstroImageJ, Align and Drizzle
Determinant is another mathematical tool we need to find out the X-1 that we need to calculate T.
You can always test if a matrix has an inverse, that's when the determinant is not zero.
det(T) = not equal zero
In the computer world we don't have infinite number to work with, not resolution enough, we get rounding errors. So if the determinant have a very small value it's the same as it probably will not have an inverse.
More information about determinant:
Coming more later.
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