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  • Nonsingular matrices and equivalences

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  • Definition of nonsingular matrix: matrix is invertible
  • Definition of nonsingular matrix: the associated homogeneous linear system has only the trivial solution
  • Definition of singular matrix (not nonsingular)
  • Proof of several equivalences for nonsingular matrix
  • Equivalence theorem for nonsingular matrices: the equation Ax=b has a unique solution for all b.
  • Equivalence theorem for nonsingular matrices: the equation Ax=b has a solution for all b.
  • Equivalence theorem for nonsingular matrices: the equation Ax=0 has only the trivial solution.
  • Equivalence theorem for nonsingular matrices: the rows of A span R^n (or C^n).
  • Equivalence theorem for nonsingular matrices: the columns of A span R^n (or C^n).
  • Equivalence theorem for nonsingular matrices: the rows of A are linearly independent.
  • Equivalence theorem for nonsingular matrices: the columns of A are linearly independent.
  • Equivalence theorem for nonsingular matrices: the rows of A are a basis for R^n (or C^n).
  • Equivalence theorem for nonsingular matrices: the columns of A are a basis for R^n (or C^n).
  • Equivalence theorem for nonsingular matrices: the dimension of the column space of A is n.
  • Equivalence theorem for nonsingular matrices: there is a pivot position in every row of A.
  • Equivalence theorem for nonsingular matrices: the matrix A row-reduces to the identity matrix.
  • Equivalence theorem for nonsingular matrices: the matrix A has an inverse.
  • Equivalence theorem for nonsingular matrices: the matrix A has a left inverse.
  • Equivalence theorem for nonsingular matrices: the matrix A has a right inverse.
  • Equivalence theorem for nonsingular matrices: the transpose of the matrix A has an inverse.
  • Equivalence theorem for nonsingular matrices: the linear transformation given by T(x)=Ax is one-to-one/injective.
  • Equivalence theorem for nonsingular matrices: the linear transformation given by T(x)=Ax is onto/surjective.
  • Equivalence theorem for nonsingular matrices: the linear transformation given by T(x)=Ax has an inverse.
  • Equivalence theorem for nonsingular matrices: the linear transformation given by T(x)=Ax is an isomorphism.
  • Equivalence theorem for nonsingular matrices: the determinant of A is nonzero.
  • Equivalence theorem for nonsingular matrices: the matrix A has rank n.
  • Equivalence theorem for nonsingular matrices: the null space of the matrix A is {0}.
  • Equivalence theorem for nonsingular matrices: the nullity of the matrix A is 0.
  • Equivalence theorem for nonsingular matrices: the matrix A does not have 0 as an eigenvalue.
  • Equivalence theorem for nonsingular matrices: the matrix A is a change-of-basis matrix.
  • Equivalence theorem for nonsingular matrices: the matrix A represents the identity map with respect to some pair of bases.
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  1. Equivalence theorem for nonsingular matrices: the matrix A represents the identity map with respect to some pair of bases.

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  • The 0 vector is unique.#23958
  • The 0 vector multiplied by any scalar equals the 0 vector.#23961
  • The additive inverse of a vector equals the vector multiplied by -1.#23963
  • The additive inverse of a vector is called the negative of the vector.#23956
  • The additive inverse of a vector is unique.#23959
  • The adjoint of a matrix-scalar product is the product of the adjoint and the conjugate.#23508
  • The adjoint of a product of matrices is the product of the adjoints in reverse order.#23513
  • The adjoint of a sum is the sum of the adjoints.#23507
  • The Cauchy-Schwartz inequality#23913
  • The Cauchy-Schwarz inequality#24092
  • The Cayley-Hamilton theorem for a linear transformation#24046
  • The Cayley-Hamilton theorem for a matrix.#23707
  • The change of coordinates matrix between two bases exists and is unique#23996
  • The characteristic polynomial applied to the matrix gives the 0 matrix.#23706
  • The column space of a matrix is a vector space#24109
  • The column space of an m-by-n matrix is a subspace of R^m (or C^m)#23876
  • The composition of injective linear transformations is injective#24025
  • The composition of invertible linear transformations is invertible#24027
  • The composition of linear transformations is a linear transformation#24024
  • The composition of surjective linear transformations is surjective#24026
  • The condition number of matrix measures how close it is to being singular#23750
  • The conjugate of a matrix-scalar product is the product of the conjugates.#23468
  • The conjugate of a product of matrices is the product of the conjugates.#23469
  • The conjugate of a sum of vectors in C^n is the sum of the conjugates#23791
  • The conjugate of the sum of matrices is the sum of the conjugates.#23467
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