| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 3 | SLEPc - Scalable Library for Eigenvalue Problem Computations | ||
| 4 | Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain | ||
| 5 | |||
| 6 | This file is part of SLEPc. | ||
| 7 | SLEPc is distributed under a 2-clause BSD license (see LICENSE). | ||
| 8 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 9 | */ | ||
| 10 | /* | ||
| 11 | This example implements one of the problems found at | ||
| 12 | NLEVP: A Collection of Nonlinear Eigenvalue Problems, | ||
| 13 | The University of Manchester. | ||
| 14 | The details of the collection can be found at: | ||
| 15 | [1] T. Betcke et al., "NLEVP: A Collection of Nonlinear Eigenvalue | ||
| 16 | Problems", ACM Trans. Math. Software 39(2), Article 7, 2013. | ||
| 17 | |||
| 18 | The gun problem arises from model of a radio-frequency gun cavity, with | ||
| 19 | the complex nonlinear function | ||
| 20 | T(lambda) = K-lambda*M+i*lambda^(1/2)*W1+i*(lambda-108.8774^2)^(1/2)*W2 | ||
| 21 | |||
| 22 | Data files can be downloaded from https://gitlab.com/slepc/datafiles | ||
| 23 | */ | ||
| 24 | |||
| 25 | static char help[] = "Radio-frequency gun cavity.\n\n" | ||
| 26 | "The command line options are:\n" | ||
| 27 | "-K <filename1> -M <filename2> -W1 <filename3> -W2 <filename4>, where filename1,..,filename4 are files containing the matrices in PETSc binary form defining the GUN problem.\n\n"; | ||
| 28 | |||
| 29 | #include <slepcnep.h> | ||
| 30 | |||
| 31 | #define NMAT 4 | ||
| 32 | #define SIGMA 108.8774 | ||
| 33 | |||
| 34 | 3 | int main(int argc,char **argv) | |
| 35 | { | ||
| 36 | 3 | Mat A[NMAT]; /* problem matrices */ | |
| 37 | 3 | FN f[NMAT]; /* functions to define the nonlinear operator */ | |
| 38 | 3 | FN ff[2]; /* auxiliary functions to define the nonlinear operator */ | |
| 39 | 3 | NEP nep; /* nonlinear eigensolver context */ | |
| 40 | 3 | PetscBool terse,flg; | |
| 41 | 3 | const char* string[NMAT]={"-K","-M","-W1","-W2"}; | |
| 42 | 3 | char filename[PETSC_MAX_PATH_LEN]; | |
| 43 | 3 | PetscScalar numer[2],sigma; | |
| 44 | 3 | PetscInt i; | |
| 45 | 3 | PetscViewer viewer; | |
| 46 | |||
| 47 |
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3 | PetscFunctionBeginUser; |
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3 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
| 49 | |||
| 50 |
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3 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"GUN problem\n\n")); |
| 51 | #if !defined(PETSC_USE_COMPLEX) | ||
| 52 | SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"This example requires complex scalars!"); | ||
| 53 | #endif | ||
| 54 | |||
| 55 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 56 | Load the problem matrices | ||
| 57 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 58 | |||
| 59 |
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15 | for (i=0;i<NMAT;i++) { |
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12 | PetscCall(PetscOptionsGetString(NULL,NULL,string[i],filename,sizeof(filename),&flg)); |
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12 | PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must indicate a filename with the %s option",string[i]); |
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12 | PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer)); |
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12 | PetscCall(MatCreate(PETSC_COMM_WORLD,&A[i])); |
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12 | PetscCall(MatSetFromOptions(A[i])); |
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12 | PetscCall(MatLoad(A[i],viewer)); |
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12 | PetscCall(PetscViewerDestroy(&viewer)); |
| 67 | } | ||
| 68 | |||
| 69 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 70 | Create the problem functions | ||
| 71 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 72 | |||
| 73 | /* f1=1 */ | ||
| 74 |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&f[0])); |
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3 | PetscCall(FNSetType(f[0],FNRATIONAL)); |
| 76 | 3 | numer[0] = 1.0; | |
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3 | PetscCall(FNRationalSetNumerator(f[0],1,numer)); |
| 78 | |||
| 79 | /* f2=-lambda */ | ||
| 80 |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&f[1])); |
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3 | PetscCall(FNSetType(f[1],FNRATIONAL)); |
| 82 | 3 | numer[0] = -1.0; numer[1] = 0.0; | |
| 83 |
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3 | PetscCall(FNRationalSetNumerator(f[1],2,numer)); |
| 84 | |||
| 85 | /* f3=i*sqrt(lambda) */ | ||
| 86 |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&f[2])); |
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3 | PetscCall(FNSetType(f[2],FNSQRT)); |
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3 | PetscCall(FNSetScale(f[2],1.0,PETSC_i)); |
| 89 | |||
| 90 | /* f4=i*sqrt(lambda-sigma^2) */ | ||
| 91 | 3 | sigma = SIGMA*SIGMA; | |
| 92 |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&ff[0])); |
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3 | PetscCall(FNSetType(ff[0],FNSQRT)); |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&ff[1])); |
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3 | PetscCall(FNSetType(ff[1],FNRATIONAL)); |
| 96 | 3 | numer[0] = 1.0; numer[1] = -sigma; | |
| 97 |
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3 | PetscCall(FNRationalSetNumerator(ff[1],2,numer)); |
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3 | PetscCall(FNCreate(PETSC_COMM_WORLD,&f[3])); |
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3 | PetscCall(FNSetType(f[3],FNCOMBINE)); |
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3 | PetscCall(FNCombineSetChildren(f[3],FN_COMBINE_COMPOSE,ff[1],ff[0])); |
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3 | PetscCall(FNSetScale(f[3],1.0,PETSC_i)); |
| 102 | |||
| 103 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 104 | Create the eigensolver and solve the problem | ||
| 105 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 106 | |||
| 107 |
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3 | PetscCall(NEPCreate(PETSC_COMM_WORLD,&nep)); |
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3 | PetscCall(NEPSetSplitOperator(nep,4,A,f,UNKNOWN_NONZERO_PATTERN)); |
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3 | PetscCall(NEPSetFromOptions(nep)); |
| 110 | |||
| 111 |
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3 | PetscCall(NEPSolve(nep)); |
| 112 | |||
| 113 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 114 | Display solution and clean up | ||
| 115 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ | ||
| 116 | |||
| 117 | /* show detailed info unless -terse option is given by user */ | ||
| 118 |
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3 | PetscCall(PetscOptionsHasName(NULL,NULL,"-terse",&terse)); |
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3 | if (terse) PetscCall(NEPErrorView(nep,NEP_ERROR_RELATIVE,NULL)); |
| 120 | else { | ||
| 121 | ✗ | PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO_DETAIL)); | |
| 122 | ✗ | PetscCall(NEPConvergedReasonView(nep,PETSC_VIEWER_STDOUT_WORLD)); | |
| 123 | ✗ | PetscCall(NEPErrorView(nep,NEP_ERROR_RELATIVE,PETSC_VIEWER_STDOUT_WORLD)); | |
| 124 | ✗ | PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); | |
| 125 | } | ||
| 126 |
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3 | PetscCall(NEPDestroy(&nep)); |
| 127 |
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15 | for (i=0;i<NMAT;i++) { |
| 128 |
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12 | PetscCall(MatDestroy(&A[i])); |
| 129 |
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12 | PetscCall(FNDestroy(&f[i])); |
| 130 | } | ||
| 131 |
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9 | for (i=0;i<2;i++) PetscCall(FNDestroy(&ff[i])); |
| 132 |
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3 | PetscCall(SlepcFinalize()); |
| 133 | return 0; | ||
| 134 | } | ||
| 135 | |||
| 136 | /*TEST | ||
| 137 | |||
| 138 | build: | ||
| 139 | requires: complex | ||
| 140 | |||
| 141 | test: | ||
| 142 | suffix: 1 | ||
| 143 | args: -K ${DATAFILESPATH}/matrices/complex/gun_K.petsc -M ${DATAFILESPATH}/matrices/complex/gun_M.petsc -W1 ${DATAFILESPATH}/matrices/complex/gun_W1.petsc -W2 ${DATAFILESPATH}/matrices/complex/gun_W2.petsc -nep_type nleigs -rg_type polygon -rg_polygon_vertices 12500-1i,120500-1i,120500+30000i,70000+30000i -nep_target 65000 -nep_nev 24 -terse | ||
| 144 | requires: double complex datafilespath !defined(PETSC_USE_64BIT_INDICES) !defined(PETSCTEST_VALGRIND) | ||
| 145 | timeoutfactor: 10 | ||
| 146 | |||
| 147 | TEST*/ | ||
| 148 |