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- Matrix `AB` is the matrix A in band storage, in rows 1 to KL+KU+1. The j-th column of A is stored in the j-th column of the matrix `AB` as `AB(KU+1+i-j,j) = A(i,j)` for max(1,j-KU)<=i<=min(N,j+kl).
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- Matrix `AFB` stores the details of the LU factorization of the band matrix A, as computed by `DGBTRF`. `U` is stored as an upper triangular band matrix with KL+KU superdiagonals in rows 1 to `KL`+`KU`+1, and the multipliers used during the factorization are stored in rows `KL`+`KU`+2 to 2*`KL`+`KU`+1.
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- Matrix `AFB` stores the details of the LU factorization of the band matrix A, as computed by `DGBTRF`. `U` is stored as an upper triangular band matrix with KL+KU superdiagonals in rows 1 to `KL`+`KU`+1, and the multipliers used during the factorization are stored in rows `KL`+`KU`+2 to 2*`KL`+`KU`+1.
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- The leading dimension of `AB`, `LDAB` >= KL+KU+1.
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-The leading dimension of `AFB`, `LDAFB` >= 2*KL+KU+1.
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-The leading dimension of `AFB`, `LDAFB` >= 2*KL+KU+1.
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-`dla_gbrpvgrw()` corresponds to the [LAPACK][LAPACK] function [`dla_gbrpvgrw`][lapack-dla_gbrpvgrw].
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