1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
|
SUBROUTINE BD02AD( DEF, NR, DPAR, IPAR, VEC, N, M, P, E, LDE, A,
1 LDA, B, LDB, C, LDC, D, LDD, NOTE, DWORK,
2 LDWORK, INFO )
C
C SLICOT RELEASE 5.0.
C
C Copyright (c) 2002-2009 NICONET e.V.
C
C This program is free software: you can redistribute it and/or
C modify it under the terms of the GNU General Public License as
C published by the Free Software Foundation, either version 2 of
C the License, or (at your option) any later version.
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public License
C along with this program. If not, see
C <http://www.gnu.org/licenses/>.
C
C PURPOSE
C
C To generate benchmark examples for time-invariant,
C discrete-time dynamical systems
C
C E x_k+1 = A x_k + B u_k
C
C y_k = C x_k + D u_k
C
C E, A are real N-by-N matrices, B is N-by-M, C is P-by-N, and
C D is P-by-M. In many examples, E is the identity matrix and D is
C the zero matrix.
C
C This routine is an implementation of the benchmark library
C DTDSX (Version 1.0) described in [1].
C
C ARGUMENTS
C
C Mode Parameters
C
C DEF CHARACTER*1
C Specifies the kind of values used as parameters when
C generating parameter-dependent and scalable examples
C (i.e., examples with NR(1) = 2, 3, or 4):
C = 'D': Default values defined in [1] are used;
C = 'N': Values set in DPAR and IPAR are used.
C This parameter is not referenced if NR(1) = 1.
C Note that the scaling parameter of examples with
C NR(1) = 3 or 4 is considered as a regular parameter in
C this context.
C
C Input/Output Parameters
C
C NR (input) INTEGER array, dimension (2)
C Specifies the index of the desired example according
C to [1].
C NR(1) defines the group:
C 1 : parameter-free problems of fixed size
C 2 : parameter-dependent problems of fixed size
C 3 : parameter-free problems of scalable size
C 4 : parameter-dependent problems of scalable size
C NR(2) defines the number of the benchmark example
C within a certain group according to [1].
C
C DPAR (input/output) DOUBLE PRECISION array, dimension (7)
C On entry, if DEF = 'N' and the desired example depends on
C real parameters, then the array DPAR must contain the
C values for these parameters.
C For an explanation of the parameters see [1].
C For Example 2.1, DPAR(1), ..., DPAR(3) define the
C parameters 'tau', 'delta', 'K', respectively.
C On exit, if DEF = 'D' and the desired example depends on
C real parameters, then the array DPAR is overwritten by the
C default values given in [1].
C
C IPAR (input/output) INTEGER array, dimension (1)
C On entry, if DEF = 'N' and the desired example depends on
C integer parameters, then the array IPAR must contain the
C values for these parameters.
C For an explanation of the parameters see [1].
C For Example 3.1, IPAR(1) defines the parameter 'n'.
C On exit, if DEF = 'D' and the desired example depends on
C integer parameters, then the array IPAR is overwritten by
C the default values given in [1].
C
C VEC (output) LOGICAL array, dimension (8)
C Flag vector which displays the availabilty of the output
C data:
C VEC(1), ..., VEC(3) refer to N, M, and P, respectively,
C and are always .TRUE..
C VEC(4) is .TRUE. iff E is NOT the identity matrix.
C VEC(5), ..., VEC(7) refer to A, B, and C, respectively,
C and are always .TRUE..
C VEC(8) is .TRUE. iff D is NOT the zero matrix.
C
C N (output) INTEGER
C The actual state dimension, i.e., the order of the
C matrices E and A.
C
C M (output) INTEGER
C The number of columns in the matrices B and D.
C
C P (output) INTEGER
C The number of rows in the matrices C and D.
C
C E (output) DOUBLE PRECISION array, dimension (LDE,N)
C The leading N-by-N part of this array contains the
C matrix E.
C NOTE that this array is overwritten (by the identity
C matrix), if VEC(4) = .FALSE..
C
C LDE INTEGER
C The leading dimension of array E. LDE >= N.
C
C A (output) DOUBLE PRECISION array, dimension (LDA,N)
C The leading N-by-N part of this array contains the
C matrix A.
C
C LDA INTEGER
C The leading dimension of array A. LDA >= N.
C
C B (output) DOUBLE PRECISION array, dimension (LDB,M)
C The leading N-by-M part of this array contains the
C matrix B.
C
C LDB INTEGER
C The leading dimension of array B. LDB >= N.
C
C C (output) DOUBLE PRECISION array, dimension (LDC,N)
C The leading P-by-N part of this array contains the
C matrix C.
C
C LDC INTEGER
C The leading dimension of array C. LDC >= P.
C
C D (output) DOUBLE PRECISION array, dimension (LDD,M)
C The leading P-by-M part of this array contains the
C matrix D.
C NOTE that this array is overwritten (by the zero
C matrix), if VEC(8) = .FALSE..
C
C LDD INTEGER
C The leading dimension of array D. LDD >= P.
C
C NOTE (output) CHARACTER*70
C String containing short information about the chosen
C example.
C
C Workspace
C
C DWORK DOUBLE PRECISION array, dimension (LDWORK)
C NOTE that DWORK is not used in the current version
C of BD02AD.
C
C LDWORK INTEGER
C LDWORK >= 1.
C
C Error Indicator
C
C INFO INTEGER
C = 0: successful exit;
C < 0: if INFO = -i, the i-th argument had an illegal
C value; in particular, INFO = -3 or -4 indicates
C that at least one of the parameters in DPAR or
C IPAR, respectively, has an illegal value;
C = 1: data file can not be opened or has wrong format.
C
C REFERENCES
C
C [1] Kressner, D., Mehrmann, V. and Penzl, T.
C DTDSX - a Collection of Benchmark Examples for State-Space
C Realizations of Discrete-Time Dynamical Systems.
C SLICOT Working Note 1998-10. 1998.
C
C NUMERICAL ASPECTS
C
C None
C
C CONTRIBUTOR
C
C D. Kressner, V. Mehrmann, and T. Penzl (TU Chemnitz)
C
C For questions concerning the collection or for the submission of
C test examples, please contact Volker Mehrmann
C (Email: volker.mehrmann@mathematik.tu-chemnitz.de).
C
C REVISIONS
C
C June 1999, V. Sima.
C
C KEYWORDS
C
C discrete-time dynamical systems
C
C ******************************************************************
C
C .. Parameters ..
DOUBLE PRECISION ZERO, ONE, TWO, THREE, FOUR, PI
PARAMETER ( ZERO = 0.0D0, ONE = 1.0D0, TWO = 2.0D0,
1 THREE = 3.0D0, FOUR = 4.0D0,
2 PI = .3141592653589793D1 )
C .. Scalar Arguments ..
CHARACTER DEF
CHARACTER*70 NOTE
INTEGER INFO, LDA, LDB, LDC, LDD, LDE, LDWORK, M, N, P
C .. Array Arguments ..
LOGICAL VEC(8)
INTEGER IPAR(*), NR(*)
DOUBLE PRECISION A(LDA,*), B(LDB,*), C(LDC,*), D(LDD,*), DPAR(*),
1 DWORK(*), E(LDE,*)
C .. Local Scalars ..
CHARACTER*12 DATAF
INTEGER I, J, STATUS
DOUBLE PRECISION TEMP
C .. Local Arrays ..
LOGICAL VECDEF(8)
C .. External Functions ..
C . LAPACK .
LOGICAL LSAME
EXTERNAL LSAME
C .. External Subroutines ..
C . LAPACK .
EXTERNAL DLASET
C .. Data Statements ..
C . default values for availabities .
DATA VECDEF /.TRUE., .TRUE., .TRUE., .FALSE.,
1 .TRUE., .TRUE., .TRUE., .FALSE./
C
C .. Executable Statements ..
C
INFO = 0
DO 10 I = 1, 8
VEC(I) = VECDEF(I)
10 CONTINUE
C
IF (NR(1) .EQ. 1) THEN
C
IF (NR(2) .EQ. 1) THEN
NOTE = 'Laub 1979, Ex. 2: uncontrollable-unobservable data'
N = 2
M = 1
P = 1
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
A(1,1) = FOUR
A(2,1) = -.45D1
A(1,2) = THREE
A(2,2) = -.35D1
CALL DLASET('A', N, M, -ONE, ONE, B, LDB)
C(1,1) = 3.0D0
C(1,2) = 2.0D0
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 2) THEN
NOTE = 'Laub 1979, Ex. 3'
N = 2
M = 2
P = 2
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
A(1,1) = .9512D0
A(2,2) = .9048D0
B(1,1) = .4877D1
B(1,2) = .4877D1
B(2,1) = -.11895D1
B(2,2) = .3569D1
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 3) THEN
NOTE = 'Van Dooren 1981, Ex. II'
N = 2
M = 1
P = 1
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
A(1,1) = TWO
A(2,1) = ONE
A(1,2) = -ONE
A(2,2) = ZERO
CALL DLASET('A', N, M, ZERO, ONE, B, LDB)
CALL DLASET('A', P, N, ONE, ZERO, C, LDC)
D(1,1) = ZERO
C
ELSE IF (NR(2) .EQ. 4) THEN
NOTE = 'Ionescu/Weiss 1992'
N = 2
M = 2
P = 2
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
A(1,2) = ONE
A(2,2) = -ONE
CALL DLASET('A', N, M, ZERO, ONE, B, LDB)
B(2,1) = TWO
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 5) THEN
NOTE = 'Jonckheere 1981'
N = 2
M = 1
P = 2
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
A(1,2) = ONE
CALL DLASET('A', N, M, ONE, ZERO, B, LDB)
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 6) THEN
NOTE = 'Ackerson/Fu 1970: satellite control problem'
N = 4
M = 2
P = 4
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 7) THEN
NOTE = 'Litkouhi 1983: system with slow and fast modes'
N = 4
M = 2
P = 4
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 8) THEN
NOTE = 'Lu/Lin 1993, Ex. 4.3'
N = 4
M = 4
P = 4
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('U', P, N, ONE, ONE, C, LDC)
C(1,3) = TWO
C(1,4) = FOUR
C(2,4) = TWO
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 9) THEN
NOTE = 'Gajic/Shen 1993, Section 2.7.4: chemical plant'
N = 5
M = 2
P = 5
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 10) THEN
NOTE = 'Davison/Wang 1974'
N = 6
M = 2
P = 2
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
VEC(8) = .TRUE.
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
A(1,2) = ONE
A(2,3) = ONE
A(4,5) = ONE
A(5,6) = ONE
CALL DLASET('A', N, M, ZERO, ZERO, B, LDB)
B(3,1) = ONE
B(6,2) = ONE
CALL DLASET('A', P, N, ZERO, ZERO, C, LDC)
C(1,1) = ONE
C(1,2) = ONE
C(2,4) = ONE
C(2,5) = -ONE
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
D(1,1) = ONE
D(2,1) = ONE
C
ELSE IF (NR(2) .EQ. 11) THEN
NOTE = 'Patnaik et al. 1980: tubular ammonia reactor'
N = 9
M = 3
P = 2
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', P, N, ZERO, ZERO, C, LDC)
C(1,1) = ONE
C(2,5) = ONE
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE IF (NR(2) .EQ. 12) THEN
NOTE = 'Smith 1969: two-stand cold rolling mill'
N = 10
M = 3
P = 5
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
VEC(8) = .TRUE.
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
CALL DLASET('A', N, N, ZERO, ONE, A(2,1), LDA)
A(1,10) = .112D0
CALL DLASET('A', N, M, ZERO, ZERO, B, LDB)
B(1,1) = .276D1
B(1,2) = -.135D1
B(1,3) = -.46D0
CALL DLASET('A', P, N, ZERO, ZERO, C, LDC)
C(1,1) = ONE
C(2,10) = .894D0
C(3,10) = -.1693D2
C(4,10) = .7D-1
C(5,10) = .398D0
OPEN(1, IOSTAT = STATUS, STATUS = 'OLD', FILE = 'BD02112.dat')
IF (STATUS .NE. 0) THEN
INFO = 1
ELSE
DO 110 I = 1, P
READ (1, FMT = *, IOSTAT = STATUS) (D(I,J), J = 1, M)
IF (STATUS .NE. 0) INFO = 1
110 CONTINUE
END IF
CLOSE(1)
C
ELSE
INFO = -2
END IF
C
IF (((NR(2) .GE. 6) .AND. (NR(2) .LE. 9)) .OR.
1 (NR(2) .EQ. 11)) THEN
C .. loading data files
WRITE (DATAF(1:11), '(A,I2.2,A)') 'BD021', NR(2), '.dat'
OPEN(1, IOSTAT = STATUS, STATUS = 'OLD', FILE = DATAF(1:11))
IF (STATUS .NE. 0) THEN
INFO = 1
ELSE
DO 120 I = 1, N
READ (1, FMT = *, IOSTAT = STATUS) (A(I,J), J = 1, N)
IF (STATUS .NE. 0) INFO = 1
120 CONTINUE
DO 130 I = 1, N
READ (1, FMT = *, IOSTAT = STATUS) (B(I,J), J = 1, M)
IF (STATUS .NE. 0) INFO = 1
130 CONTINUE
END IF
CLOSE(1)
END IF
C
ELSE IF (NR(1) .EQ. 2) THEN
IF (.NOT. (LSAME(DEF,'D') .OR. LSAME(DEF,'N'))) THEN
INFO = -1
RETURN
END IF
C
IF (NR(2) .EQ. 1) THEN
NOTE = 'Pappas et al. 1980: process control of paper machine'
IF (LSAME(DEF,'D')) THEN
DPAR(1) = .1D9
DPAR(2) = ONE
DPAR(3) = ONE
END IF
IF (DPAR(1) .EQ. ZERO) INFO = -3
N = 4
M = 1
P = 1
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
TEMP = DPAR(2) / DPAR(1)
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
CALL DLASET('A', N-1, N-1, ZERO, ONE, A(2,1), LDA)
A(1,1) = ONE - TEMP
CALL DLASET('A', N, M, ZERO, ZERO, B, LDB)
B(1,1) = DPAR(3) * TEMP
CALL DLASET('A', P, N, ZERO, ZERO, C, LDC)
C(1,4) = ONE
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE
INFO = -2
END IF
C
ELSE IF (NR(1) .EQ. 3) THEN
IF (.NOT. (LSAME(DEF,'D') .OR. LSAME(DEF,'N'))) THEN
INFO = -1
RETURN
END IF
C
IF (NR(2) .EQ. 1) THEN
NOTE = 'Pappas et al. 1980, Ex. 3'
IF (LSAME(DEF,'D')) IPAR(1) = 100
IF (IPAR(1) .LT. 2) INFO = -4
N = IPAR(1)
M = 1
P = N
IF (LDE .LT. N) INFO = -10
IF (LDA .LT. N) INFO = -12
IF (LDB .LT. N) INFO = -14
IF (LDC .LT. P) INFO = -16
IF (LDD .LT. P) INFO = -18
IF (INFO .NE. 0) RETURN
C
CALL DLASET('A', N, N, ZERO, ONE, E, LDE)
CALL DLASET('A', N, N, ZERO, ZERO, A, LDA)
CALL DLASET('A', N-1, N-1, ZERO, ONE, A(1,2), LDA)
CALL DLASET('A', N, M, ZERO, ZERO, B, LDB)
B(N,1) = ONE
CALL DLASET('A', P, N, ZERO, ONE, C, LDC)
CALL DLASET('A', P, M, ZERO, ZERO, D, LDD)
C
ELSE
INFO = -2
END IF
C
ELSE
INFO = -2
END IF
C
RETURN
C *** Last Line of BD02AD ***
END
|
