BELOW IS A LISTING OF THE INPUT/OUTPUT FILES WHICH ARE ACCESSED BY THE REAL SYMMETRIC LANCZOS EIGENVECTOR PROGRAM, LEVEC. INCLUDED ALSO IS A SAMPLE OF THE INPUT FILE WHICH LEVEC REQUIRES ON FILE 5. THE PARAMETER ARE SUPPLIED IN FREE FORMAT. FILE 8 CONTAINS THE DATA FOR THE REAL SYMMETRIC NXN MATRIX A. LEVEC COMPUTES EIGENVECTORS FOR EACH OF A USER-SPECIFIED SUBSET OF THE EIGENVALUES COMPUTED BY THE COMPANION PROGRAM LEVAL. SAMPLE DEFINITIONS OF THE INPUT/OUTPUT FILES FOR LEVEC ------------------------------------------------------------------ LEVEC EXEC TO RUN LANCZOS EIGENVECTOR PROGRAM, REAL SYMMETRIC MATRICES 06 TERM FILEDEF 2 DISK &1 HISTORY A (RECFM F LRECL 80 BLOCK 80 FILEDEF 3 DISK &1 GOODEV A (RECFM F LRECL 80 BLOCK 80 FILEDEF 4 DISK &1 ERRINV A (RECFM F LRECL 80 BLOCK 80 FILEDEF 5 DISK LEVEC INPUT A (RECFM F LRECL 80 BLOCK 80 FILEDEF 8 DISK &1 INPUT A (RECFM F LRECL 80 BLOCK 80 FILEDEF 9 DISK &1 ERREST A (RECFM F LRECL 80 BLOCK 80 FILEDEF 10 DISK &1 BOUNDS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 11 DISK &1 TEIGVECS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 12 DISK &1 RITZVECS A (RECFM F LRECL 80 BLOCK 80 FILEDEF 13 DISK &1 PAIGE A (RECFM F LRECL 80 BLOCK 80 LOAD LEVEC LESUB LEMULT ------------------------------------------------------------------- SAMPLE INPUT FILE FOR LEVEC ------------------------------------------------------------------- LEVEC REAL SYMMETRIC EIGENVECTOR COMPUTATIONS, NO REORTHOGONALIZATION LINE 1 MDIMTV MDIMRV MBETA(MAX.DIMENSIONS, TVEC, RITVEC AND BETA 10000 10000 2000 LINE 2 RELTOL .0000000001 LINE 3 MBOUND NTVCON SVTVEC IREAD (FLAGS 0 1 0 1 LINE 4 TVSTOP LVCONT ERCONT IWRITE (FLAGS 0 1 1 1 LINE 5 RHSEED (RANDOM GENERATOR SEED FOR STARTING VECTOR IN INVERM 45329517 LINE 6 MATNO N 100 100 ------------------------------------------------------------------ .