Description Usage Arguments Value Examples

Backsolve with band 1 upper Cholesky.

1 | ```
band1_backsolve(U, z)
``` |

`U` |
An upper triangular square matrix with non-zero entries only on the main diagonal and the first superdiagonal. |

`z` |
A vector with as many elements as the number of rows of U. |

A vector.

1 2 3 4 | ```
Q <- ar1_prec_irregular(c(1, 3:4, 6), 0.5, 1)
U <- chol_tridiag_upper(Q)
z <- rnorm(nrow(U))
band1_backsolve(U, z)
``` |

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