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CONTENTS<br />

xxviii<br />

53 QM/MM INTERFACES 373<br />

53.1 Chemshell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373<br />

54 THE TDHF AND TDKS PROGRAMS 373<br />

55 ORBITAL MERGING 375<br />

55.1 Defining the input orbitals (ORBITAL) . . . . . . . . . . . . . . . . . . . . . . 375<br />

55.2 Moving orbitals to the output set (MOVE) . . . . . . . . . . . . . . . . . . . . . 375<br />

55.3 Adding orbitals to the output set (ADD) . . . . . . . . . . . . . . . . . . . . . . 375<br />

55.4 Defining extra symmetries (EXTRA) . . . . . . . . . . . . . . . . . . . . . . . 376<br />

55.5 Defining offsets in the output set (OFFSET) . . . . . . . . . . . . . . . . . . . 376<br />

55.6 Projecting orbitals (PROJECT) . . . . . . . . . . . . . . . . . . . . . . . . . . 376<br />

55.7 Symmetric orthonormalization (ORTH) . . . . . . . . . . . . . . . . . . . . . . 377<br />

55.8 Schmidt orthonormalization (SCHMIDT) . . . . . . . . . . . . . . . . . . . . . 377<br />

55.9 Rotating orbitals (ROTATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . 377<br />

55.10Initialization of a new output set (INIT) . . . . . . . . . . . . . . . . . . . . . 377<br />

55.11Saving the merged orbitals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377<br />

55.12Printing options (PRINT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377<br />

55.13Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378<br />

55.13.1 H 2 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378<br />

55.13.2 NO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378<br />

56 MATRIX OPERATIONS 380<br />

56.1 Calling the matrix facility (MATROP) . . . . . . . . . . . . . . . . . . . . . . . 381<br />

56.2 Loading matrices (LOAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382<br />

56.2.1 Loading orbitals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382<br />

56.2.2 Loading density matrices . . . . . . . . . . . . . . . . . . . . . . . . . 382<br />

56.2.3 Loading the AO overlap matrix S . . . . . . . . . . . . . . . . . . . . 382<br />

56.2.4 Loading S −1/2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382<br />

56.2.5 Loading the one-electron hamiltonian . . . . . . . . . . . . . . . . . . 382<br />

56.2.6 Loading the kinetic or potential energy operators . . . . . . . . . . . . 383<br />

56.2.7 Loading one-electron property operators . . . . . . . . . . . . . . . . . 383<br />

56.2.8 Loading matrices from plain records . . . . . . . . . . . . . . . . . . . 383<br />

56.3 Saving matrices (SAVE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383<br />

56.4 Adding matrices (ADD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384<br />

56.5 Trace of a matrix or the product of two matrices (TRACE) . . . . . . . . . . . . 384

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