Investigation of routines for inverting block tridiagonal matrices. [DECBT/SOLBT and BTMS, for CDC 6600 and 7600]

Technical Report · Fri Feb 29 23:00:00 EST 1980

OSTI ID:5571593

Marx, K D

Numerical experiments were performed to determine the computer time required to invert block tridiagonal matrices on the Sandia CDC 6600 and 7600 computer systems. Timing data for the DECBT/SOLBT and BTMS routines developed are given for various conditions of use. These routines are compared to other options, such as band solvers. A system for solving cyclic tridiagonal systems was derived; timing data for it are presented. FORTRAN source decks and compiled versions of pertinent routines were collected in a permanent file and a library for general user access. 7 figures.

• Research Organization: Sandia Labs., Livermore, CA (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5571593
• Report Number(s): SAND-80-8206
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
CDC COMPUTERS
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COMPARATIVE EVALUATIONS
COMPUTER CALCULATIONS
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COMPUTERS
D CODES
DIFFERENTIAL EQUATIONS
EFFICIENCY
EQUATIONS
FLUID MECHANICS
KINETICS
MATRICES
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NUMERICAL SOLUTION
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S CODES