PDP-10 Archive: decus/20-0025/eigsr.exe from decus_20tap1

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<++2	`@@(' DO YOU DESIRE USER INSTRUCTIONS, TYPE "YES" OR "NO"--',$)(A3)(/' THIS PROGRAM FINDS THE EIGENVALUES AND EIGENVECTORS OF A'/' REAL SYMMETRIC MATRIX BY THE JACOBI-CORBATO METHOD.'/)(' THE MATRIX IS OF THE FORM'/'  A11   A12   ...   A1N     WHERE THE A(I,J) ARE REAL (FLOATING POINT)'/'  A21   A22   ...   A2N     AND N (FIXED POINT) CANNOT EXCEED 25:'/'   .'/'   .'/'  AN1   AN2   ...   ANN'/)(' SINCE THE MATRIX IS SYMMETRIC, ONLY THE ELEMENTS ON AND ABOVE'/' THE DIAGONAL NEED BE ENTERED'/)(' THE PROGRAM TYPES A(1,1)?  THE USER TYPES THE FIRST ROW ELEMENTS.'/' THE PROGRAM TYPES A(2,2)?  THE USER TYPES THE SECOND ROW'/'     STARTING WITH THE DIAGONAL ELEMENT.  THIS CONTINUES UNTIL A(N,N) HAS BEEN ENTERED.'/)(' INPUT IS TYPED IN FREE FIELD FORMAT, A BLANK ENDS THE FIELD.'/)(' AFTER A(N,N) HAS BEEN ENTERED, THE PROGRAM PROVIDES THE OPPORTUNITY'/' AND INSTRUCTIONS FOR CORRECTION OF TYPING ERRORS.'/)(' NOW YOU TRY IT.'/)(' ORDER? ',$)(I)(' PROGRAM CAN ACCEPT ONLY',I2,' VALUES PER LINE.  OBSERVE CAREFULLY'/' THE LABELS AS YOU ENTER DATA.  TYPE AT MOST',I2,' VALUES PER LINE.'/' REMEMBER THAT YOU WILL HAVE A CHANCE TO MAKE CORRECTIONS BEFORE CALCULATION BEGINS.'/)(14X,'A(',I2,',',I2,')? ',$)('  A(',I2,',',I2,') TO A(',I2,',',I2,')? ',$)(10F)(/' N MUST BE BETWEEN 1 AND 25.  TRY AGAIN.'/)(' ARE ANY OF THE ABOVE A(I,J) ELEMENTS TYPED INCORRECTLY?  IF THE USER'/' WISHES TO CORRECT AN ELEMENT, TYPE "YES".'/)(/' ANY CORRECTIONS?--',$)(' CORRECT AN ELEMENT BY TYPING I (ROW SUBSCRIPT),'/' A COMMA, J (COLUMN SUBSCRIPT), A COMMA, AND THE VALUE.')(/' WHAT ARE I, J, A(I,J)?--',$)(2I,F)(/' ILLEGAL SUBSCRIPT.  EITHER I GREATER J, I MORE THAN N, OR J MORE THAN N.  TRY AGAIN.')(/' ILLEGAL COMMAND.  TRY AGAIN.')(///' ORDER =',I3)(//6X,'EIGENVALUE',I3,5X,'EIGENVECTOR')(1P2E19.7/(1PE38.7))(1PE38.7)(/' SUM OF SQUARES OF THE OFF-DIAGONAL ELEMENTS OF XT A X =',1PE16.7,','/' WHERE XT MEANS X-TRANSPOSE.'/)(' A',I3,8F9.5)(' B',I3,8F9.5)(/'  E',I3,1PE16.8/(1PE22.8))YES  NO   + -<
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