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  • Least squares

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  • Definition of least-squares solution to a linear system
  • Definition of least-squares error of a linear system
  • Formula for computing the least squares solution to a linear system.
  • Formula for computing the least squares solution to a linear system
  • The least squares solution to a linear system is unique if and only if the columns of the coefficient matrix are linearly independent.
  • Definition of the least-squares linear fit to 2-dimensional data
  • Formula for the least-squares linear fit to 2-dimensional data
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  1. The least squares solution to a linear system is unique if and only if the columns of the coefficient matrix are linearly independent.

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  • The conjugate of the transpose is the transpose of the conjugate.#23505
  • The conjugate of vector-scalar multiplication in C^n is the product of the conjugates.#23793
  • The coordinate vector relative to a given basis is a linear mapping to R^n (or C^n).#23992
  • The coordinate vector relative to a given basis is an injective linear mapping to R^n (or C^n).#23993
  • The coordinate vector relative to a given basis is a surjective linear mapping to R^n (or C^n).#23994
  • The crazy vector space is a vector space.#24107
  • The determinant function exists.#23734
  • The determinant function is unique.#23735
  • The determinant of a block diagonal matrix is the product of the determinants of the blocks.#23731
  • The determinant of a matrix can be computed as a cofactor expansion across any row.#23719
  • The determinant of a matrix can be computed as a cofactor expansion down any column.#23720
  • The determinant of a matrix can be expressed as a product of the diagonal entries in a non-scaled echelon form.#23725
  • The determinant of a matrix measures the area/volume of the parallelogram/parallelipiped determined by its columns.#23746
  • The determinant of a triangular matrix is the product of the entries on the diagonal.#23744
  • The determinant of the inverse of A is the reciprocal of the determinant of A.#23730
  • The determinant of the matrix of a linear transformation is the factor by which the area/volume changes.#23747
  • The dimension of a direct sum of subspaces is the sum of the dimensions of the subspaces.#23971
  • The dimension of a eigenspace is less than or equal to the (algebraic) multiplicity of the eigenvalue.#23708
  • The dimension of a subspace is less than or equal to the dimension of the whole space#24010
  • The dimension of the domain of an injective linear transformation is at most the dimension of the codomain.#24033
  • The dimension of the domain of a surjective linear transformation is at least the dimension of the codomain.#24034
  • The direct sum of a subspace and its orthogonal complement is the whole space.#23922
  • The echelon form can be used to determine if a linear system is consistent.#23771
  • The eigenspace of a linear transformation is a nontrivial subspace.#24051
  • The eigenvalues of a matrix are the roots/solutions of its characteristic polynomial/equation.#23705
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