| 1 | /* specfunc/gsl_sf_bessel.h |
| 2 | * |
| 3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 3 of the License, or (at |
| 8 | * your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | */ |
| 19 | |
| 20 | /* Author: G. Jungman */ |
| 21 | |
| 22 | #ifndef __GSL_SF_BESSEL_H__ |
| 23 | #define __GSL_SF_BESSEL_H__ |
| 24 | |
| 25 | #include <stdlib.h> |
| 26 | #include <gsl/gsl_mode.h> |
| 27 | #include <gsl/gsl_precision.h> |
| 28 | #include <gsl/gsl_sf_result.h> |
| 29 | |
| 30 | #undef __BEGIN_DECLS |
| 31 | #undef __END_DECLS |
| 32 | #ifdef __cplusplus |
| 33 | # define __BEGIN_DECLS extern "C" { |
| 34 | # define __END_DECLS } |
| 35 | #else |
| 36 | # define __BEGIN_DECLS /* empty */ |
| 37 | # define __END_DECLS /* empty */ |
| 38 | #endif |
| 39 | |
| 40 | __BEGIN_DECLS |
| 41 | |
| 42 | |
| 43 | /* Regular Bessel Function J_0(x) |
| 44 | * |
| 45 | * exceptions: none |
| 46 | */ |
| 47 | int gsl_sf_bessel_J0_e(const double x, gsl_sf_result * result); |
| 48 | double gsl_sf_bessel_J0(const double x); |
| 49 | |
| 50 | |
| 51 | /* Regular Bessel Function J_1(x) |
| 52 | * |
| 53 | * exceptions: GSL_EUNDRFLW |
| 54 | */ |
| 55 | int gsl_sf_bessel_J1_e(const double x, gsl_sf_result * result); |
| 56 | double gsl_sf_bessel_J1(const double x); |
| 57 | |
| 58 | |
| 59 | /* Regular Bessel Function J_n(x) |
| 60 | * |
| 61 | * exceptions: GSL_EUNDRFLW |
| 62 | */ |
| 63 | int gsl_sf_bessel_Jn_e(int n, double x, gsl_sf_result * result); |
| 64 | double gsl_sf_bessel_Jn(const int n, const double x); |
| 65 | |
| 66 | |
| 67 | /* Regular Bessel Function J_n(x), nmin <= n <= nmax |
| 68 | * |
| 69 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 70 | */ |
| 71 | int gsl_sf_bessel_Jn_array(int nmin, int nmax, double x, double * result_array); |
| 72 | |
| 73 | |
| 74 | /* Irregular Bessel function Y_0(x) |
| 75 | * |
| 76 | * x > 0.0 |
| 77 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 78 | */ |
| 79 | int gsl_sf_bessel_Y0_e(const double x, gsl_sf_result * result); |
| 80 | double gsl_sf_bessel_Y0(const double x); |
| 81 | |
| 82 | |
| 83 | /* Irregular Bessel function Y_1(x) |
| 84 | * |
| 85 | * x > 0.0 |
| 86 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 87 | */ |
| 88 | int gsl_sf_bessel_Y1_e(const double x, gsl_sf_result * result); |
| 89 | double gsl_sf_bessel_Y1(const double x); |
| 90 | |
| 91 | |
| 92 | /* Irregular Bessel function Y_n(x) |
| 93 | * |
| 94 | * x > 0.0 |
| 95 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 96 | */ |
| 97 | int gsl_sf_bessel_Yn_e(int n,const double x, gsl_sf_result * result); |
| 98 | double gsl_sf_bessel_Yn(const int n,const double x); |
| 99 | |
| 100 | |
| 101 | /* Irregular Bessel function Y_n(x), nmin <= n <= nmax |
| 102 | * |
| 103 | * x > 0.0 |
| 104 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 105 | */ |
| 106 | int gsl_sf_bessel_Yn_array(const int nmin, const int nmax, const double x, double * result_array); |
| 107 | |
| 108 | |
| 109 | /* Regular modified Bessel function I_0(x) |
| 110 | * |
| 111 | * exceptions: GSL_EOVRFLW |
| 112 | */ |
| 113 | int gsl_sf_bessel_I0_e(const double x, gsl_sf_result * result); |
| 114 | double gsl_sf_bessel_I0(const double x); |
| 115 | |
| 116 | |
| 117 | /* Regular modified Bessel function I_1(x) |
| 118 | * |
| 119 | * exceptions: GSL_EOVRFLW, GSL_EUNDRFLW |
| 120 | */ |
| 121 | int gsl_sf_bessel_I1_e(const double x, gsl_sf_result * result); |
| 122 | double gsl_sf_bessel_I1(const double x); |
| 123 | |
| 124 | |
| 125 | /* Regular modified Bessel function I_n(x) |
| 126 | * |
| 127 | * exceptions: GSL_EOVRFLW, GSL_EUNDRFLW |
| 128 | */ |
| 129 | int gsl_sf_bessel_In_e(const int n, const double x, gsl_sf_result * result); |
| 130 | double gsl_sf_bessel_In(const int n, const double x); |
| 131 | |
| 132 | |
| 133 | /* Regular modified Bessel function I_n(x) for n=nmin,...,nmax |
| 134 | * |
| 135 | * nmin >=0, nmax >= nmin |
| 136 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 137 | */ |
| 138 | int gsl_sf_bessel_In_array(const int nmin, const int nmax, const double x, double * result_array); |
| 139 | |
| 140 | |
| 141 | /* Scaled regular modified Bessel function |
| 142 | * exp(-|x|) I_0(x) |
| 143 | * |
| 144 | * exceptions: none |
| 145 | */ |
| 146 | int gsl_sf_bessel_I0_scaled_e(const double x, gsl_sf_result * result); |
| 147 | double gsl_sf_bessel_I0_scaled(const double x); |
| 148 | |
| 149 | |
| 150 | /* Scaled regular modified Bessel function |
| 151 | * exp(-|x|) I_1(x) |
| 152 | * |
| 153 | * exceptions: GSL_EUNDRFLW |
| 154 | */ |
| 155 | int gsl_sf_bessel_I1_scaled_e(const double x, gsl_sf_result * result); |
| 156 | double gsl_sf_bessel_I1_scaled(const double x); |
| 157 | |
| 158 | |
| 159 | /* Scaled regular modified Bessel function |
| 160 | * exp(-|x|) I_n(x) |
| 161 | * |
| 162 | * exceptions: GSL_EUNDRFLW |
| 163 | */ |
| 164 | int gsl_sf_bessel_In_scaled_e(int n, const double x, gsl_sf_result * result); |
| 165 | double gsl_sf_bessel_In_scaled(const int n, const double x); |
| 166 | |
| 167 | |
| 168 | /* Scaled regular modified Bessel function |
| 169 | * exp(-|x|) I_n(x) for n=nmin,...,nmax |
| 170 | * |
| 171 | * nmin >=0, nmax >= nmin |
| 172 | * exceptions: GSL_EUNDRFLW |
| 173 | */ |
| 174 | int gsl_sf_bessel_In_scaled_array(const int nmin, const int nmax, const double x, double * result_array); |
| 175 | |
| 176 | |
| 177 | /* Irregular modified Bessel function K_0(x) |
| 178 | * |
| 179 | * x > 0.0 |
| 180 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 181 | */ |
| 182 | int gsl_sf_bessel_K0_e(const double x, gsl_sf_result * result); |
| 183 | double gsl_sf_bessel_K0(const double x); |
| 184 | |
| 185 | |
| 186 | /* Irregular modified Bessel function K_1(x) |
| 187 | * |
| 188 | * x > 0.0 |
| 189 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 190 | */ |
| 191 | int gsl_sf_bessel_K1_e(const double x, gsl_sf_result * result); |
| 192 | double gsl_sf_bessel_K1(const double x); |
| 193 | |
| 194 | |
| 195 | /* Irregular modified Bessel function K_n(x) |
| 196 | * |
| 197 | * x > 0.0 |
| 198 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 199 | */ |
| 200 | int gsl_sf_bessel_Kn_e(const int n, const double x, gsl_sf_result * result); |
| 201 | double gsl_sf_bessel_Kn(const int n, const double x); |
| 202 | |
| 203 | |
| 204 | /* Irregular modified Bessel function K_n(x) for n=nmin,...,nmax |
| 205 | * |
| 206 | * x > 0.0, nmin >=0, nmax >= nmin |
| 207 | * exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW |
| 208 | */ |
| 209 | int gsl_sf_bessel_Kn_array(const int nmin, const int nmax, const double x, double * result_array); |
| 210 | |
| 211 | |
| 212 | /* Scaled irregular modified Bessel function |
| 213 | * exp(x) K_0(x) |
| 214 | * |
| 215 | * x > 0.0 |
| 216 | * exceptions: GSL_EDOM |
| 217 | */ |
| 218 | int gsl_sf_bessel_K0_scaled_e(const double x, gsl_sf_result * result); |
| 219 | double gsl_sf_bessel_K0_scaled(const double x); |
| 220 | |
| 221 | |
| 222 | /* Scaled irregular modified Bessel function |
| 223 | * exp(x) K_1(x) |
| 224 | * |
| 225 | * x > 0.0 |
| 226 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 227 | */ |
| 228 | int gsl_sf_bessel_K1_scaled_e(const double x, gsl_sf_result * result); |
| 229 | double gsl_sf_bessel_K1_scaled(const double x); |
| 230 | |
| 231 | |
| 232 | /* Scaled irregular modified Bessel function |
| 233 | * exp(x) K_n(x) |
| 234 | * |
| 235 | * x > 0.0 |
| 236 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 237 | */ |
| 238 | int gsl_sf_bessel_Kn_scaled_e(int n, const double x, gsl_sf_result * result); |
| 239 | double gsl_sf_bessel_Kn_scaled(const int n, const double x); |
| 240 | |
| 241 | |
| 242 | /* Scaled irregular modified Bessel function exp(x) K_n(x) for n=nmin,...,nmax |
| 243 | * |
| 244 | * x > 0.0, nmin >=0, nmax >= nmin |
| 245 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 246 | */ |
| 247 | int gsl_sf_bessel_Kn_scaled_array(const int nmin, const int nmax, const double x, double * result_array); |
| 248 | |
| 249 | |
| 250 | /* Regular spherical Bessel function j_0(x) = sin(x)/x |
| 251 | * |
| 252 | * exceptions: none |
| 253 | */ |
| 254 | int gsl_sf_bessel_j0_e(const double x, gsl_sf_result * result); |
| 255 | double gsl_sf_bessel_j0(const double x); |
| 256 | |
| 257 | |
| 258 | /* Regular spherical Bessel function j_1(x) = (sin(x)/x - cos(x))/x |
| 259 | * |
| 260 | * exceptions: GSL_EUNDRFLW |
| 261 | */ |
| 262 | int gsl_sf_bessel_j1_e(const double x, gsl_sf_result * result); |
| 263 | double gsl_sf_bessel_j1(const double x); |
| 264 | |
| 265 | |
| 266 | /* Regular spherical Bessel function j_2(x) = ((3/x^2 - 1)sin(x) - 3cos(x)/x)/x |
| 267 | * |
| 268 | * exceptions: GSL_EUNDRFLW |
| 269 | */ |
| 270 | int gsl_sf_bessel_j2_e(const double x, gsl_sf_result * result); |
| 271 | double gsl_sf_bessel_j2(const double x); |
| 272 | |
| 273 | |
| 274 | /* Regular spherical Bessel function j_l(x) |
| 275 | * |
| 276 | * l >= 0, x >= 0.0 |
| 277 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 278 | */ |
| 279 | int gsl_sf_bessel_jl_e(const int l, const double x, gsl_sf_result * result); |
| 280 | double gsl_sf_bessel_jl(const int l, const double x); |
| 281 | |
| 282 | |
| 283 | /* Regular spherical Bessel function j_l(x) for l=0,1,...,lmax |
| 284 | * |
| 285 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 286 | */ |
| 287 | int gsl_sf_bessel_jl_array(const int lmax, const double x, double * result_array); |
| 288 | |
| 289 | |
| 290 | /* Regular spherical Bessel function j_l(x) for l=0,1,...,lmax |
| 291 | * Uses Steed's method. |
| 292 | * |
| 293 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 294 | */ |
| 295 | int gsl_sf_bessel_jl_steed_array(const int lmax, const double x, double * jl_x_array); |
| 296 | |
| 297 | |
| 298 | /* Irregular spherical Bessel function y_0(x) |
| 299 | * |
| 300 | * exceptions: none |
| 301 | */ |
| 302 | int gsl_sf_bessel_y0_e(const double x, gsl_sf_result * result); |
| 303 | double gsl_sf_bessel_y0(const double x); |
| 304 | |
| 305 | |
| 306 | /* Irregular spherical Bessel function y_1(x) |
| 307 | * |
| 308 | * exceptions: GSL_EUNDRFLW |
| 309 | */ |
| 310 | int gsl_sf_bessel_y1_e(const double x, gsl_sf_result * result); |
| 311 | double gsl_sf_bessel_y1(const double x); |
| 312 | |
| 313 | |
| 314 | /* Irregular spherical Bessel function y_2(x) |
| 315 | * |
| 316 | * exceptions: GSL_EUNDRFLW |
| 317 | */ |
| 318 | int gsl_sf_bessel_y2_e(const double x, gsl_sf_result * result); |
| 319 | double gsl_sf_bessel_y2(const double x); |
| 320 | |
| 321 | |
| 322 | /* Irregular spherical Bessel function y_l(x) |
| 323 | * |
| 324 | * exceptions: GSL_EUNDRFLW |
| 325 | */ |
| 326 | int gsl_sf_bessel_yl_e(int l, const double x, gsl_sf_result * result); |
| 327 | double gsl_sf_bessel_yl(const int l, const double x); |
| 328 | |
| 329 | |
| 330 | /* Irregular spherical Bessel function y_l(x) for l=0,1,...,lmax |
| 331 | * |
| 332 | * exceptions: GSL_EUNDRFLW |
| 333 | */ |
| 334 | int gsl_sf_bessel_yl_array(const int lmax, const double x, double * result_array); |
| 335 | |
| 336 | |
| 337 | /* Regular scaled modified spherical Bessel function |
| 338 | * |
| 339 | * Exp[-|x|] i_0(x) |
| 340 | * |
| 341 | * exceptions: none |
| 342 | */ |
| 343 | int gsl_sf_bessel_i0_scaled_e(const double x, gsl_sf_result * result); |
| 344 | double gsl_sf_bessel_i0_scaled(const double x); |
| 345 | |
| 346 | |
| 347 | /* Regular scaled modified spherical Bessel function |
| 348 | * |
| 349 | * Exp[-|x|] i_1(x) |
| 350 | * |
| 351 | * exceptions: GSL_EUNDRFLW |
| 352 | */ |
| 353 | int gsl_sf_bessel_i1_scaled_e(const double x, gsl_sf_result * result); |
| 354 | double gsl_sf_bessel_i1_scaled(const double x); |
| 355 | |
| 356 | |
| 357 | /* Regular scaled modified spherical Bessel function |
| 358 | * |
| 359 | * Exp[-|x|] i_2(x) |
| 360 | * |
| 361 | * exceptions: GSL_EUNDRFLW |
| 362 | */ |
| 363 | int gsl_sf_bessel_i2_scaled_e(const double x, gsl_sf_result * result); |
| 364 | double gsl_sf_bessel_i2_scaled(const double x); |
| 365 | |
| 366 | |
| 367 | /* Regular scaled modified spherical Bessel functions |
| 368 | * |
| 369 | * Exp[-|x|] i_l(x) |
| 370 | * |
| 371 | * i_l(x) = Sqrt[Pi/(2x)] BesselI[l+1/2,x] |
| 372 | * |
| 373 | * l >= 0 |
| 374 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 375 | */ |
| 376 | int gsl_sf_bessel_il_scaled_e(const int l, double x, gsl_sf_result * result); |
| 377 | double gsl_sf_bessel_il_scaled(const int l, const double x); |
| 378 | |
| 379 | |
| 380 | /* Regular scaled modified spherical Bessel functions |
| 381 | * |
| 382 | * Exp[-|x|] i_l(x) |
| 383 | * for l=0,1,...,lmax |
| 384 | * |
| 385 | * exceptions: GSL_EUNDRFLW |
| 386 | */ |
| 387 | int gsl_sf_bessel_il_scaled_array(const int lmax, const double x, double * result_array); |
| 388 | |
| 389 | |
| 390 | /* Irregular scaled modified spherical Bessel function |
| 391 | * Exp[x] k_0(x) |
| 392 | * |
| 393 | * x > 0.0 |
| 394 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 395 | */ |
| 396 | int gsl_sf_bessel_k0_scaled_e(const double x, gsl_sf_result * result); |
| 397 | double gsl_sf_bessel_k0_scaled(const double x); |
| 398 | |
| 399 | |
| 400 | /* Irregular modified spherical Bessel function |
| 401 | * Exp[x] k_1(x) |
| 402 | * |
| 403 | * x > 0.0 |
| 404 | * exceptions: GSL_EDOM, GSL_EUNDRFLW, GSL_EOVRFLW |
| 405 | */ |
| 406 | int gsl_sf_bessel_k1_scaled_e(const double x, gsl_sf_result * result); |
| 407 | double gsl_sf_bessel_k1_scaled(const double x); |
| 408 | |
| 409 | |
| 410 | /* Irregular modified spherical Bessel function |
| 411 | * Exp[x] k_2(x) |
| 412 | * |
| 413 | * x > 0.0 |
| 414 | * exceptions: GSL_EDOM, GSL_EUNDRFLW, GSL_EOVRFLW |
| 415 | */ |
| 416 | int gsl_sf_bessel_k2_scaled_e(const double x, gsl_sf_result * result); |
| 417 | double gsl_sf_bessel_k2_scaled(const double x); |
| 418 | |
| 419 | |
| 420 | /* Irregular modified spherical Bessel function |
| 421 | * Exp[x] k_l[x] |
| 422 | * |
| 423 | * k_l(x) = Sqrt[Pi/(2x)] BesselK[l+1/2,x] |
| 424 | * |
| 425 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 426 | */ |
| 427 | int gsl_sf_bessel_kl_scaled_e(int l, const double x, gsl_sf_result * result); |
| 428 | double gsl_sf_bessel_kl_scaled(const int l, const double x); |
| 429 | |
| 430 | |
| 431 | /* Irregular scaled modified spherical Bessel function |
| 432 | * Exp[x] k_l(x) |
| 433 | * |
| 434 | * for l=0,1,...,lmax |
| 435 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 436 | */ |
| 437 | int gsl_sf_bessel_kl_scaled_array(const int lmax, const double x, double * result_array); |
| 438 | |
| 439 | |
| 440 | /* Regular cylindrical Bessel function J_nu(x) |
| 441 | * |
| 442 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 443 | */ |
| 444 | int gsl_sf_bessel_Jnu_e(const double nu, const double x, gsl_sf_result * result); |
| 445 | double gsl_sf_bessel_Jnu(const double nu, const double x); |
| 446 | |
| 447 | |
| 448 | /* Irregular cylindrical Bessel function Y_nu(x) |
| 449 | * |
| 450 | * exceptions: |
| 451 | */ |
| 452 | int gsl_sf_bessel_Ynu_e(double nu, double x, gsl_sf_result * result); |
| 453 | double gsl_sf_bessel_Ynu(const double nu, const double x); |
| 454 | |
| 455 | |
| 456 | /* Regular cylindrical Bessel function J_nu(x) |
| 457 | * evaluated at a series of x values. The array |
| 458 | * contains the x values. They are assumed to be |
| 459 | * strictly ordered and positive. The array is |
| 460 | * over-written with the values of J_nu(x_i). |
| 461 | * |
| 462 | * exceptions: GSL_EDOM, GSL_EINVAL |
| 463 | */ |
| 464 | int gsl_sf_bessel_sequence_Jnu_e(double nu, gsl_mode_t mode, size_t size, double * v); |
| 465 | |
| 466 | |
| 467 | /* Scaled modified cylindrical Bessel functions |
| 468 | * |
| 469 | * Exp[-|x|] BesselI[nu, x] |
| 470 | * x >= 0, nu >= 0 |
| 471 | * |
| 472 | * exceptions: GSL_EDOM |
| 473 | */ |
| 474 | int gsl_sf_bessel_Inu_scaled_e(double nu, double x, gsl_sf_result * result); |
| 475 | double gsl_sf_bessel_Inu_scaled(double nu, double x); |
| 476 | |
| 477 | |
| 478 | /* Modified cylindrical Bessel functions |
| 479 | * |
| 480 | * BesselI[nu, x] |
| 481 | * x >= 0, nu >= 0 |
| 482 | * |
| 483 | * exceptions: GSL_EDOM, GSL_EOVRFLW |
| 484 | */ |
| 485 | int gsl_sf_bessel_Inu_e(double nu, double x, gsl_sf_result * result); |
| 486 | double gsl_sf_bessel_Inu(double nu, double x); |
| 487 | |
| 488 | |
| 489 | /* Scaled modified cylindrical Bessel functions |
| 490 | * |
| 491 | * Exp[+|x|] BesselK[nu, x] |
| 492 | * x > 0, nu >= 0 |
| 493 | * |
| 494 | * exceptions: GSL_EDOM |
| 495 | */ |
| 496 | int gsl_sf_bessel_Knu_scaled_e(const double nu, const double x, gsl_sf_result * result); |
| 497 | double gsl_sf_bessel_Knu_scaled(const double nu, const double x); |
| 498 | |
| 499 | int gsl_sf_bessel_Knu_scaled_e10_e(const double nu, const double x, gsl_sf_result_e10 * result); |
| 500 | |
| 501 | /* Modified cylindrical Bessel functions |
| 502 | * |
| 503 | * BesselK[nu, x] |
| 504 | * x > 0, nu >= 0 |
| 505 | * |
| 506 | * exceptions: GSL_EDOM, GSL_EUNDRFLW |
| 507 | */ |
| 508 | int gsl_sf_bessel_Knu_e(const double nu, const double x, gsl_sf_result * result); |
| 509 | double gsl_sf_bessel_Knu(const double nu, const double x); |
| 510 | |
| 511 | |
| 512 | /* Logarithm of modified cylindrical Bessel functions. |
| 513 | * |
| 514 | * Log[BesselK[nu, x]] |
| 515 | * x > 0, nu >= 0 |
| 516 | * |
| 517 | * exceptions: GSL_EDOM |
| 518 | */ |
| 519 | int gsl_sf_bessel_lnKnu_e(const double nu, const double x, gsl_sf_result * result); |
| 520 | double gsl_sf_bessel_lnKnu(const double nu, const double x); |
| 521 | |
| 522 | |
| 523 | /* s'th positive zero of the Bessel function J_0(x). |
| 524 | * |
| 525 | * exceptions: |
| 526 | */ |
| 527 | int gsl_sf_bessel_zero_J0_e(unsigned int s, gsl_sf_result * result); |
| 528 | double gsl_sf_bessel_zero_J0(unsigned int s); |
| 529 | |
| 530 | |
| 531 | /* s'th positive zero of the Bessel function J_1(x). |
| 532 | * |
| 533 | * exceptions: |
| 534 | */ |
| 535 | int gsl_sf_bessel_zero_J1_e(unsigned int s, gsl_sf_result * result); |
| 536 | double gsl_sf_bessel_zero_J1(unsigned int s); |
| 537 | |
| 538 | |
| 539 | /* s'th positive zero of the Bessel function J_nu(x). |
| 540 | * |
| 541 | * exceptions: |
| 542 | */ |
| 543 | int gsl_sf_bessel_zero_Jnu_e(double nu, unsigned int s, gsl_sf_result * result); |
| 544 | double gsl_sf_bessel_zero_Jnu(double nu, unsigned int s); |
| 545 | |
| 546 | |
| 547 | __END_DECLS |
| 548 | |
| 549 | #endif /* __GSL_SF_BESSEL_H__ */ |
| 550 | |