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Thomas algorithm can be used to solve __________

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in Computational Fluid Dynamics by (118k points)
Thomas algorithm can be used to solve __________

(a) any matrix

(b) all square matrices

(c) only penta-diagonal matrices

(d) only tri-diagonal matrices

I got this question in an online interview.

Query is from Discretization Aspects topic in division Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics

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Right choice is (d) only tri-diagonal matrices

To explain I would say: The other name of the Thomas algorithm is Tri-diagonal matrix algorithm. Tri-diagonal matrices are matrices with non-zero elements in the main diagonal and the diagonals above and below it.

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