(SR52) Real Determinants

06162020, 04:08 PM
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(SR52) Real Determinants
An excerpt from Programmable Calculator Evaluation of Real Determinants, Interface Age, May 1980 (pgs 104107), M. Patt & L. Fisher {University of Lowell}
" … pocket calculator program … presented for use with the Texas Instruments Model SR52 (Algebraic) … selfcontained and complete, fits on a single magnetic card … enable an operator to quickly evaluate real determinants of sizes twobytwo through sixbysix … most accurate when all determinant elements are integers. Errors are generally less than 0.001 % for a sixbysix (worst case) determinant with all integer elements. SOLUTION BY GAUSSIAN ELIMINATION The program written for the SR52 calculator evaluates the determinant by a modified Gaussian elimination process. Through the systematic addition of rows, this procedure develops a lowertriangular matrix whose determinant is equal to that of the original matrix. The determinant is then evaluated by taking the trace (product of elements on the diagonal) of the lowertriangular matrix … " BEST! SlideRule 

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