NEPWhich

Determines which part of the spectrum is requested.

Synopsis

typedef enum { NEP_LARGEST_MAGNITUDE  = 1,
               NEP_SMALLEST_MAGNITUDE = 2,
               NEP_LARGEST_REAL       = 3,
               NEP_SMALLEST_REAL      = 4,
               NEP_LARGEST_IMAGINARY  = 5,
               NEP_SMALLEST_IMAGINARY = 6,
               NEP_TARGET_MAGNITUDE   = 7,
               NEP_TARGET_REAL        = 8,
               NEP_TARGET_IMAGINARY   = 9,
               NEP_ALL                = 10,
               NEP_WHICH_USER         = 11 } NEPWhich;

Values

• NEP_LARGEST_MAGNITUDE - largest \(|\lambda|\)

• NEP_SMALLEST_MAGNITUDE - smallest \(|\lambda|\)

• NEP_LARGEST_REAL - largest \(\mathrm{Re}(\lambda)\)

• NEP_SMALLEST_REAL - smallest \(\mathrm{Re}(\lambda)\)

• NEP_LARGEST_IMAGINARY - largest \(\mathrm{Im}(\lambda)\)

• NEP_SMALLEST_IMAGINARY - smallest \(\mathrm{Im}(\lambda)\)

• NEP_TARGET_MAGNITUDE - smallest \(|\lambda-\tau|\)

• NEP_TARGET_REAL - smallest \(|\mathrm{Re}(\lambda-\tau)|\)

• NEP_TARGET_IMAGINARY - smallest \(|\mathrm{Im}(\lambda-\tau)|\)

• NEP_ALL - all \(\lambda\in\Omega\)

• NEP_WHICH_USER - user-defined sorting criterion

Notes

The target \(\tau\) is a scalar value provided with NEPSetTarget().

The case NEP_ALL needs a region \(\Omega\) specified with an RG object.

See Also

NEP: Nonlinear Eigenvalue Problems, NEPSetWhichEigenpairs(), NEPSetTarget()

Level

intermediate

Location

include/slepcnep.h

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