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- ZLANHT - 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 tridiagonal matrix A
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- DOUBLE PRECISION FUNCTION ZLANHT( NORM, N, D, E )
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- CHARACTER NORM
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- INTEGER N
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- DOUBLE PRECISION D( * )
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- COMPLEX*16 E( * )
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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
- ZLANHT 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 tridiagonal matrix A.
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- ZLANHT returns the value
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- ZLANHT = ( 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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- PPPPaaaaggggeeee 1111
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- ZZZZLLLLAAAANNNNHHHHTTTT((((3333SSSS)))) ZZZZLLLLAAAANNNNHHHHTTTT((((3333SSSS))))
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- NORM (input) CHARACTER*1
- Specifies the value to be returned in ZLANHT as described above.
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- N (input) INTEGER
- The order of the matrix A. N >= 0. When N = 0, ZLANHT is set to
- zero.
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- D (input) DOUBLE PRECISION array, dimension (N)
- The diagonal elements of A.
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- E (input) COMPLEX*16 array, dimension (N-1)
- The (n-1) sub-diagonal or super-diagonal elements of A.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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- PPPPaaaaggggeeee 2222
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