## Engineering and scientific subroutine library: Guide and referenceThe Engineering and Scientific Subroutine Library (ESSL) is a set of high performance mathematical subroutines that can be used with FORTRAN, assembler language, and APL2 programs operating under an MVS or VM operating system. |

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### Contents

Guide Information | 1 |

ConvolutionsCorrelations Subroutines _ 640 | 16 |

Designing Your Program | 23 |

Copyright | |

47 other sections not shown

### Common terms and phrases

array containing numbers array speciﬁed assembler language aux2 band matrix Call Statement calling sequence column complex numbers compressed matrix storage Computational Errors condition number conjugate transpose data type indicated deﬁned dot product eigensystem eigenvalues eigenvectors Error Conditions error handling error message ERRSET ESSL error ESSL Release ESSL subroutines example shows factorization ﬁnd ﬁrst forma formb FORTRAN FORTRAN Version Fourier Transform fullword integer Function Gaussian elimination group B processors Hermitian matrix INCX Y INCY indicated in Table INDX Input Argument Errors iopt iparm(3 IPVT iterative leading dimension length Linear Algebra Linear Algebra Subprograms Masking Underﬂow matrix multiplication matrix storage mode matrix transpose naux number of elements one-dimensional array Output packed storage mode positive deﬁnite symmetric problem real and complex return code Short-precision real sparse matrix sparse vector Speciﬁed specify Statement and Input stored in compressed stride for vector symmetric matrix Syntax triangular matrix tridiagonal matrix vector storage mode