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DGTSV Example

To solve the equations

Ax = b,

where A is the tridiagonal matrix

A = $\displaystyle \left(\vphantom{ \begin{array}{rrrrr} 3.0 & 2.1 & 0 & 0 & 0 \\ ... ... 0 & 0 & 7.0 & -0.9 & 8.0 \\ 0 & 0 & 0 & -6.0 & 7.1 \end{array} }\right.$$\displaystyle \begin{array}{rrrrr} 3.0 & 2.1 & 0 & 0 & 0 \\ 3.4 & 2.3 & -1.... ....9 & 0 \\ 0 & 0 & 7.0 & -0.9 & 8.0 \\ 0 & 0 & 0 & -6.0 & 7.1 \end{array}$$\displaystyle \left.\vphantom{ \begin{array}{rrrrr} 3.0 & 2.1 & 0 & 0 & 0 \\ ... ... 0 & 0 & 7.0 & -0.9 & 8.0 \\ 0 & 0 & 0 & -6.0 & 7.1 \end{array} }\right)$  and  b = $\displaystyle \left(\vphantom{ \begin{array}{rr} 2.7 \\ -0.5 \\ 2.6 \\ 0.6 \\ 2.7 \end{array} }\right.$$\displaystyle \begin{array}{rr} 2.7 \\ -0.5 \\ 2.6 \\ 0.6 \\ 2.7 \end{array}$$\displaystyle \left.\vphantom{ \begin{array}{rr} 2.7 \\ -0.5 \\ 2.6 \\ 0.6 \\ 2.7 \end{array} }\right)$.

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