IMPLICIT COMPLEX (C) |

IMPLICIT DOUBLE PRECISION (D) |

IMPLICIT INTEGER (I-N) |

IMPLICIT DOUBLE COMPLEX (Z) |

The first letter of a subroutine name identifies the type of the result. The second and third letters identify the form of the output matrix and its mode of storage in an array. The forms are shown below:

When the second and third letters indicate the type of matrix and its storage mode, the fourth and fifth letters indicate the operation that will be performed. The fourth and fifth letters mean different things for different subroutines, so you must read the description of the subroutine in order to find out exactly what it does. For example, DTRCO estimates the condition of a triangular matrix. DGECO estimates the condition of a general matrix and also determines the LU factorization. The operations are shown below:

A^{-1} denotes the inverse of the square matrix stored in the array A. Whenever the symbol A^{-1} appears it is assumed that the numerical inverse of the matrix stored in the array A exists. A^{T} denotes the transpose of an array A and A^{H} denotes the conjugate transpose of A for a complex matrix A.