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- ZLANHP - return the value of the one norm, or the Frobenius norm, or the
- infinity norm, or the element of largest absolute value of a complex
- hermitian matrix A, supplied in packed form
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- DOUBLE PRECISION FUNCTION ZLANHP( NORM, UPLO, N, AP, WORK )
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- CHARACTER NORM, UPLO
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- INTEGER N
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- DOUBLE PRECISION WORK( * )
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- COMPLEX*16 AP( * )
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- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
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- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- ZLANHP returns the value of the one norm, or the Frobenius norm, or the
- infinity norm, or the element of largest absolute value of a complex
- hermitian matrix A, supplied in packed form.
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- ZLANHP returns the value
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- ZLANHP = ( max(abs(A(i,j))), NORM = 'M' or 'm'
- (
- ( norm1(A), NORM = '1', 'O' or 'o'
- (
- ( normI(A), NORM = 'I' or 'i'
- (
- ( normF(A), NORM = 'F', 'f', 'E' or 'e'
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- where norm1 denotes the one norm of a matrix (maximum column sum),
- normI denotes the infinity norm of a matrix (maximum row sum) and
- normF denotes the Frobenius norm of a matrix (square root of sum of
- squares). Note that max(abs(A(i,j))) is not a matrix norm.
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- NORM (input) CHARACTER*1
- Specifies the value to be returned in ZLANHP as described above.
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- UPLO (input) CHARACTER*1
- Specifies whether the upper or lower triangular part of the
- hermitian matrix A is supplied. = 'U': Upper triangular part of
- A is supplied
- = 'L': Lower triangular part of A is supplied
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- N (input) INTEGER
- The order of the matrix A. N >= 0. When N = 0, ZLANHP is set to
- zero.
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- AP (input) COMPLEX*16 array, dimension (N*(N+1)/2)
- The upper or lower triangle of the hermitian matrix A, packed
- columnwise in a linear array. The j-th column of A is stored in
- the array AP as follows: if UPLO = 'U', AP(i + (j-1)*j/2) =
- A(i,j) for 1<=i<=j; if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) =
- A(i,j) for j<=i<=n. Note that the imaginary parts of the
- diagonal elements need not be set and are assumed to be zero.
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- WORK (workspace) DOUBLE PRECISION array, dimension (LWORK),
- where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise, WORK
- is not referenced.
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- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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