Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,98 @@
+/*
+   igraph library.
+   Copyright (C) 2010-2025  The igraph development team <igraph@igraph.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef IGRAPH_EIGEN_H
+#define IGRAPH_EIGEN_H
+
+#include "igraph_decls.h"
+#include "igraph_datatype.h"
+#include "igraph_arpack.h"
+#include "igraph_error.h"
+#include "igraph_lapack.h"
+#include "igraph_sparsemat.h"
+
+IGRAPH_BEGIN_C_DECLS
+
+typedef enum {
+    IGRAPH_EIGEN_AUTO = 0,
+    IGRAPH_EIGEN_LAPACK,
+    IGRAPH_EIGEN_ARPACK,
+    IGRAPH_EIGEN_COMP_AUTO,
+    IGRAPH_EIGEN_COMP_LAPACK,
+    IGRAPH_EIGEN_COMP_ARPACK
+} igraph_eigen_algorithm_t;
+
+typedef enum {
+    IGRAPH_EIGEN_LM = 0,
+    IGRAPH_EIGEN_SM, /* 1 */
+    IGRAPH_EIGEN_LA, /* 2 */
+    IGRAPH_EIGEN_SA, /* 3 */
+    IGRAPH_EIGEN_BE, /* 4 */
+    IGRAPH_EIGEN_LR, /* 5 */
+    IGRAPH_EIGEN_SR, /* 6 */
+    IGRAPH_EIGEN_LI, /* 7 */
+    IGRAPH_EIGEN_SI, /* 8 */
+    IGRAPH_EIGEN_ALL, /* 9 */
+    IGRAPH_EIGEN_INTERVAL, /* 10 */
+    IGRAPH_EIGEN_SELECT /* 11 */
+} igraph_eigen_which_position_t;
+
+typedef struct igraph_eigen_which_t {
+    igraph_eigen_which_position_t pos;
+    int howmany;
+    int il, iu;
+    igraph_real_t vl, vu;
+    int vestimate;
+    igraph_lapack_dgeevx_balance_t balance;
+} igraph_eigen_which_t;
+
+IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix_symmetric(const igraph_matrix_t *A,
+                                                const igraph_sparsemat_t *sA,
+                                                igraph_arpack_function_t *fun, int n,
+                                                void *extra,
+                                                igraph_eigen_algorithm_t algorithm,
+                                                const igraph_eigen_which_t *which,
+                                                igraph_arpack_options_t *options,
+                                                igraph_arpack_storage_t *storage,
+                                                igraph_vector_t *values,
+                                                igraph_matrix_t *vectors);
+
+IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix(const igraph_matrix_t *A,
+                                      const igraph_sparsemat_t *sA,
+                                      igraph_arpack_function_t *fun, int n,
+                                      void *extra,
+                                      igraph_eigen_algorithm_t algorithm,
+                                      const igraph_eigen_which_t *which,
+                                      igraph_arpack_options_t *options,
+                                      igraph_arpack_storage_t *storage,
+                                      igraph_vector_complex_t *values,
+                                      igraph_matrix_complex_t *vectors);
+
+IGRAPH_EXPORT igraph_error_t igraph_eigen_adjacency(const igraph_t *graph,
+                                         igraph_eigen_algorithm_t algorithm,
+                                         const igraph_eigen_which_t *which,
+                                         igraph_arpack_options_t *options,
+                                         igraph_arpack_storage_t *storage,
+                                         igraph_vector_t *values,
+                                         igraph_matrix_t *vectors,
+                                         igraph_vector_complex_t *cmplxvalues,
+                                         igraph_matrix_complex_t *cmplxvectors);
+
+IGRAPH_END_C_DECLS
+
+#endif