1 /* specfunc/airy_zero.c
3 * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
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.
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.
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.
20 /* Author: G. Jungman */
23 #include <gsl/gsl_math.h>
24 #include <gsl/gsl_errno.h>
25 #include <gsl/gsl_sf_airy.h>
29 static const double zero_Ai[] = {
31 -2.338107410459767039,
32 -4.087949444130970617,
33 -5.520559828095551059,
34 -6.786708090071758999,
35 -7.944133587120853123,
36 -9.022650853340980380,
37 -10.04017434155808593,
38 -11.00852430373326289,
39 -11.93601556323626252,
40 -12.82877675286575720,
41 -13.69148903521071793,
42 -14.52782995177533498,
43 -15.34075513597799686,
44 -16.13268515694577144,
45 -16.90563399742994263,
46 -17.661300105697057509,
47 -18.401132599207115416,
48 -19.126380474246952144,
49 -19.838129891721499701,
50 -20.537332907677566360,
51 -21.224829943642096955,
52 -21.901367595585130707,
53 -22.567612917496502831,
54 -23.224165001121681061,
55 -23.871564455535918567,
56 -24.510301236589677490,
57 -25.140821166148963748,
58 -25.763531400982756459,
59 -26.378805052137232374,
60 -26.986985111606367686,
61 -27.588387809882444812,
62 -28.183305502632644923,
63 -28.772009165237435382,
64 -29.354750558766287963,
65 -29.931764119086555913,
66 -30.503268611418505287,
67 -31.069468585183755604,
68 -31.63055565801265934,
69 -32.18670965295205069,
70 -32.73809960900026913,
71 -33.28488468190140188,
72 -33.82721494950865194,
73 -34.36523213386365906,
74 -34.89907025034531210,
75 -35.42885619274788846,
76 -35.95471026189862926,
77 -36.47674664437480896,
78 -36.99507384699450161,
79 -37.50979509200501613,
80 -38.02100867725525443,
81 -38.52880830509424882,
82 -39.03328338327251391,
83 -39.53451930072301805,
84 -40.03259768075417603,
85 -40.52759661388971821,
86 -41.01959087233248966,
87 -41.50865210780525018,
88 -41.99484903432643004,
89 -42.47824759730839188,
90 -42.95891113021656009,
91 -43.43690049989685412,
92 -43.91227424156370168,
93 -44.38508868433939023,
94 -44.85539806814583243,
95 -45.32325465267043011,
96 -45.78870881905730086,
97 -46.25180916491254629,
98 -46.71260259315651633,
99 -47.17113439520631705,
100 -47.62744832892739292,
101 -48.08158669175325711,
102 -48.53359038933679845,
103 -48.98349900006458366,
104 -49.43135083573678341,
105 -49.87718299868941729,
106 -50.32103143561221860,
107 -50.76293098829428522,
108 -51.20291544151056412,
109 -51.64101756824489758,
110 -52.07726917242964943,
111 -52.51170112936766183,
112 -52.94434342398931824,
113 -53.37522518708567514,
114 -53.80437472964785717,
115 -54.23181957543308298,
116 -54.65758649186871111,
117 -55.08170151939748312,
118 -55.50418999935962251,
119 -55.92507660050055598,
120 -56.34438534418670066,
121 -56.76213962840595327,
122 -57.17836225062417808,
123 -57.59307542956407782,
124 -58.00630082596830627,
125 -58.41805956240450934,
126 -58.82837224216613231,
127 -59.23725896731927534,
128 -59.64473935594259360,
129 -60.05083255860419805,
130 -60.45555727411669871
132 static const size_t size_zero_Ai = sizeof(zero_Ai)/sizeof(double);
135 static const double zero_Bi[] = {
137 -1.173713222709127925,
138 -3.271093302836352716,
139 -4.830737841662015933,
140 -6.169852128310251260,
141 -7.376762079367763714,
142 -8.491948846509388013,
143 -9.538194379346238887,
144 -10.52991350670535792,
145 -11.47695355127877944,
146 -12.38641713858273875,
147 -13.26363952294180555,
148 -14.11275680906865779,
149 -14.93705741215416404,
150 -15.739210351190482771,
151 -16.521419550634379054,
152 -17.285531624581242533,
153 -18.033113287225001572,
154 -18.765508284480081041,
155 -19.483880132989234014,
156 -20.189244785396202420,
157 -20.882495994193175768,
158 -21.564425284712977653,
159 -22.235737881803385167,
160 -22.897065554219793474,
161 -23.548977079642448269,
162 -24.191986850649000086,
163 -24.826562012152892172,
164 -25.453128427085131994,
165 -26.072075698466804494,
166 -26.683761425120990449,
167 -27.288514830076298204,
168 -27.886639871735962459,
169 -28.478417925678661737,
170 -29.064110107777650305,
171 -29.643959295918396591,
172 -30.218191897047274645,
173 -30.787019397921766297,
174 -31.350639731255585371,
175 -31.90923848358456965,
176 -32.46298996683685318,
177 -33.01205817205683814,
178 -33.55659762084006113,
179 -34.09675412765602851,
180 -34.63266548426775468,
181 -35.16446207582101720,
182 -35.69226743681080479,
183 -36.21619875398748222,
184 -36.73636732230120657,
185 -37.25287895916828697,
186 -37.76583438165180116,
187 -38.27532955056003997,
188 -38.78145598496327279,
189 -39.28430105019802461,
190 -39.78394822205711298,
191 -40.28047732954369150,
192 -40.77396477829068148,
193 -41.26448375650675678,
194 -41.75210442510106287,
195 -42.23689409345656643,
196 -42.71891738216253539,
197 -43.19823637387693118,
198 -43.67491075336673948,
199 -44.14899793766617113,
200 -44.62055319719727274,
201 -45.08962976861312825,
202 -45.55627896004907928,
203 -46.02055024940102076,
204 -46.48249137619078661,
205 -46.94214842752602207,
206 -47.39956591861496210,
207 -47.85478686825452176,
208 -48.30785286967246692,
209 -48.75880415707066192,
210 -49.20767966818603897,
211 -49.65451710315861501,
212 -50.09935297997125482,
213 -50.54222268670364757,
214 -50.98316053082286586,
215 -51.42219978571468262,
216 -51.85937273464332870,
217 -52.29471071231240525,
218 -52.72824414418606069,
219 -53.16000258371716397,
220 -53.59001474761792882,
221 -54.01830854929815828,
222 -54.44491113058688729,
223 -54.86984889184461534,
224 -55.29314752056546491,
225 -55.71483201856140365,
226 -56.13492672781406761,
227 -56.55345535507366411,
228 -56.97044099527886475,
229 -57.38590615386647834,
230 -57.79987276803497897,
231 -58.21236222702161974,
232 -58.62339539144885603,
233 -59.03299261179210306,
234 -59.44117374601743460,
235 -59.84795817643466996,
236 -60.25336482580837088
238 static const size_t size_zero_Bi = sizeof(zero_Bi)/sizeof(double);
241 static const double zero_Aip[] = {
243 -1.018792971647471089,
244 -3.248197582179836738,
245 -4.820099211178735639,
246 -6.163307355639486822,
247 -7.372177255047770177,
248 -8.488486734019722133,
249 -9.535449052433547471,
250 -10.52766039695740728,
251 -11.47505663348024529,
252 -12.384788371845747325,
253 -13.262218961665210382,
254 -14.111501970462995282,
255 -14.935937196720517467,
256 -15.738201373692538303,
257 -16.520503825433793542,
258 -17.284695050216437357,
259 -18.032344622504393395,
260 -18.764798437665954740,
261 -19.483221656567231178,
262 -20.188631509463373154,
263 -20.881922755516737701,
264 -21.563887723198974958,
265 -22.235232285348913331,
266 -22.896588738874619001,
267 -23.548526295928801574,
268 -24.191559709526353841,
269 -24.826156425921155001,
270 -25.452742561777649948,
271 -26.071707935173912515,
272 -26.683410328322449767,
273 -27.288179121523985029,
274 -27.886318408768461192,
275 -28.478109683102278108,
276 -29.063814162638199090,
277 -29.643674814632015921,
278 -30.217918124468574603,
279 -30.786755648012502519,
280 -31.350385379083034671,
281 -31.90899295843046320,
282 -32.46275274623847982,
283 -33.01182877663428709,
284 -33.55637560978942190,
285 -34.09653909480913771,
286 -34.63245705463586589,
287 -35.16425990255340758,
288 -35.69207119851046870,
289 -36.21600815233519918,
290 -36.73618207994680321,
291 -37.25269881785414827,
292 -37.76565910053887108,
293 -38.27515890473087933,
294 -38.78128976408036876,
295 -39.28413905729859644,
296 -39.78379027246823278,
297 -40.28032324990371935,
298 -40.77381440566486637,
299 -41.26433693758643383,
300 -41.75196101547722703,
301 -42.23675395695976012,
302 -42.71878039026198233,
303 -43.19810240513270670,
304 -43.67477969292950869,
305 -44.14886967681966886,
306 -44.62042763293925724,
307 -45.08950680327102630,
308 -45.55615850092696446,
309 -46.02043220845493728,
310 -46.48237566972975615,
311 -46.94203497593635633,
312 -47.39945464610575493,
313 -47.85467770262241617,
314 -48.30774574208398774,
315 -48.75869900186057804,
316 -49.20757642267037247,
317 -49.65441570746105074,
318 -50.09925337686182515,
319 -50.54212482144867502,
320 -50.98306435104524282,
321 -51.42210524126365311,
322 -51.85927977747301469,
323 -52.29461929636838876,
324 -52.72815422529939506,
325 -53.15991411950524351,
326 -53.58992769739169611,
327 -54.01822287397517367,
328 -54.44482679260982599,
329 -54.86976585510479430,
330 -55.29306575033103518,
331 -55.71475148140987392,
332 -56.13484739156885235,
333 -56.55337718874437424,
334 -56.97036396900508167,
335 -57.38583023886477265,
336 -57.79979793654895377,
337 -58.21228845227477578,
338 -58.62332264760009139,
339 -59.03292087389367419,
340 -59.44110298997521892,
341 -59.84788837897058171,
342 -60.25329596442479317
344 static const size_t size_zero_Aip = sizeof(zero_Aip)/sizeof(double);
347 static const double zero_Bip[] = {
349 -2.294439682614123247,
350 -4.073155089071828216,
351 -5.512395729663599496,
352 -6.781294445990305390,
353 -7.940178689168578927,
354 -9.019583358794239067,
355 -10.037696334908545802,
356 -11.006462667712289940,
357 -11.934261645014844663,
358 -12.827258309177217640,
359 -13.690155826835049101,
360 -14.526645763485711410,
361 -15.339693082242404109,
362 -16.131724782385900578,
363 -16.904759411889649958,
364 -17.660498743114976102,
365 -18.400394367181703280,
366 -19.125697156412638066,
367 -19.837494718415910503,
368 -20.536740241453273980,
369 -21.224275044889266569,
370 -21.900846445139208281,
371 -22.567122080497200470,
372 -23.223701521208962116,
373 -23.871125771677973595,
374 -24.509885117016242729,
375 -25.140425655367878908,
376 -25.763154776913454319,
377 -26.378445791146615697,
378 -26.986641859775034987,
379 -27.588059359225600573,
380 -28.182990771292975456,
381 -28.771707180886056250,
382 -29.354460444612957224,
383 -29.931485082026055160,
384 -30.502999931936645516,
385 -31.069209608721234058,
386 -31.63030578754333679,
387 -32.18646834257807369,
388 -32.73786635840274752,
389 -33.28465903151424981,
390 -33.82699647630635587,
391 -34.36502044767239631,
392 -34.89886499060196419,
393 -35.42865702564380962,
394 -35.95451687785511190,
395 -36.47655875580547918,
396 -36.99489118631672770,
397 -37.50961740986809593,
398 -38.02083574095788210
400 static const size_t size_zero_Bip = sizeof(zero_Bip)/sizeof(double);
404 /* [Abramowitz+Stegun, 10.4.105] */
408 const double pre = pow(z, 2.0/3.0);
409 const double zi2 = 1.0/(z*z);
410 const double zi4 = zi2 * zi2;
411 const double t1 = 5.0/48.0 * zi2;
412 const double t2 = -5.0/36.0 * zi4;
413 const double t3 = 77125.0/82944.0 * zi4 * zi2;
414 const double t4 = -108056875.0/6967296.0 * zi4 * zi4;
415 return pre * (1.0 + t1 + t2 + t3 + t4);
421 const double pre = pow(z, 2.0/3.0);
422 const double zi2 = 1.0/(z*z);
423 const double zi4 = zi2 * zi2;
424 const double t1 = -7.0/48.0 * zi2;
425 const double t2 = 35.0/288.0 * zi4;
426 const double t3 = -181223.0/207360.0 * zi4 * zi2;
427 const double t4 = 18683371.0/1244160.0 * zi4 * zi4;
428 return pre * (1.0 + t1 + t2 + t3 + t4);
434 gsl_sf_airy_zero_Ai_e(unsigned int s, gsl_sf_result * result)
436 /* CHECK_POINTER(result) */
439 DOMAIN_ERROR_MSG("s is less than 1", result);
441 else if(s < size_zero_Ai) {
442 result->val = zero_Ai[s];
443 result->err = GSL_DBL_EPSILON * fabs(result->val);
447 const double z = 3.0*M_PI/8.0 * (4.0*s - 1.0);
448 const double f = zero_f(z);
450 result->err = 2.0 * GSL_DBL_EPSILON * fabs(result->val);
457 gsl_sf_airy_zero_Bi_e(unsigned int s, gsl_sf_result * result)
459 /* CHECK_POINTER(result) */
462 DOMAIN_ERROR_MSG("s is less than 1", result);
464 else if(s < size_zero_Bi) {
465 result->val = zero_Bi[s];
466 result->err = GSL_DBL_EPSILON * fabs(result->val);
470 const double z = 3.0*M_PI/8.0 * (4.0*s - 3.0);
471 const double f = zero_f(z);
473 result->err = 2.0 * GSL_DBL_EPSILON * fabs(result->val);
480 gsl_sf_airy_zero_Ai_deriv_e(unsigned int s, gsl_sf_result * result)
482 /* CHECK_POINTER(result) */
485 DOMAIN_ERROR_MSG("s is less than 1", result);
487 else if(s < size_zero_Aip) {
488 result->val = zero_Aip[s];
489 result->err = GSL_DBL_EPSILON * fabs(result->val);
493 const double z = 3.0*M_PI/8.0 * (4.0*s - 3.0);
494 const double g = zero_g(z);
496 result->err = 2.0 * GSL_DBL_EPSILON * fabs(result->val);
503 gsl_sf_airy_zero_Bi_deriv_e(unsigned int s, gsl_sf_result * result)
505 /* CHECK_POINTER(result) */
508 DOMAIN_ERROR_MSG("s is less than 1", result);
510 else if(s < size_zero_Bip) {
511 result->val = zero_Bip[s];
512 result->err = GSL_DBL_EPSILON * fabs(result->val);
516 const double z = 3.0*M_PI/8.0 * (4.0*s - 1.0);
517 const double g = zero_g(z);
519 result->err = 2.0 * GSL_DBL_EPSILON * fabs(result->val);
524 /*-*-*-*-*-*-*-*-*-* Functions w/ Natural Prototypes *-*-*-*-*-*-*-*-*-*-*/
528 double gsl_sf_airy_zero_Ai(unsigned int s)
530 EVAL_RESULT(gsl_sf_airy_zero_Ai_e(s, &result));
533 double gsl_sf_airy_zero_Bi(unsigned int s)
535 EVAL_RESULT(gsl_sf_airy_zero_Bi_e(s, &result));
538 double gsl_sf_airy_zero_Ai_deriv(unsigned int s)
540 EVAL_RESULT(gsl_sf_airy_zero_Ai_deriv_e(s, &result));
543 double gsl_sf_airy_zero_Bi_deriv(unsigned int s)
545 EVAL_RESULT(gsl_sf_airy_zero_Bi_deriv_e(s, &result));