Dykhta, V. A. Variational necessary optimality conditions with feedback descent controls for optimal control problems. (English. Russian original) Zbl 1322.49034 Dokl. Math. 91, No. 3, 394-396 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 653-656 (2015). MSC: 49K15 93B52 PDFBibTeX XMLCite \textit{V. A. Dykhta}, Dokl. Math. 91, No. 3, 394--396 (2015; Zbl 1322.49034); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 653--656 (2015) Full Text: DOI
Shibzukhov, Z. M. Aggregation correct operations on algorithms. (English. Russian original) Zbl 1330.68255 Dokl. Math. 91, No. 3, 391-393 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 649-652 (2015). MSC: 68T05 PDFBibTeX XMLCite \textit{Z. M. Shibzukhov}, Dokl. Math. 91, No. 3, 391--393 (2015; Zbl 1330.68255); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 649--652 (2015) Full Text: DOI
Patrakeeva, O. Yu.; Kryukov, S. V. On system-dynamic tools supporting making decisions on the control of an economic system. (English. Russian original) Zbl 1354.90060 Dokl. Math. 91, No. 3, 387-390 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 645-648 (2015). MSC: 90B50 91B06 PDFBibTeX XMLCite \textit{O. Yu. Patrakeeva} and \textit{S. V. Kryukov}, Dokl. Math. 91, No. 3, 387--390 (2015; Zbl 1354.90060); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 645--648 (2015) Full Text: DOI
Rabinovich, Ya. I. Numerical methods for estimating approximate solutions of multicriteria optimization problems. (English. Russian original) Zbl 1325.65085 Dokl. Math. 91, No. 3, 384-386 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 151-153 (2015). MSC: 65K05 90C29 PDFBibTeX XMLCite \textit{Ya. I. Rabinovich}, Dokl. Math. 91, No. 3, 384--386 (2015; Zbl 1325.65085); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 151--153 (2015) Full Text: DOI
Maslov, V. P. A new distribution corresponding to thermodynamics in supercritical and subcritical regions and in the region of negative pressure. (English) Zbl 1327.76118 Dokl. Math. 91, No. 3, 379-383 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 30-34 (2015). MSC: 76N15 80A10 PDFBibTeX XMLCite \textit{V. P. Maslov}, Dokl. Math. 91, No. 3, 379--383 (2015; Zbl 1327.76118); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 30--34 (2015) Full Text: DOI
Manturov, V. O. Monodromy, groups, and picture-valued invariants of link. (English. Russian original) Zbl 1360.57017 Dokl. Math. 91, No. 3, 376-378 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 642-644 (2015). MSC: 57M25 PDFBibTeX XMLCite \textit{V. O. Manturov}, Dokl. Math. 91, No. 3, 376--378 (2015; Zbl 1360.57017); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 642--644 (2015) Full Text: DOI
Gutnova, A. K.; Makhnev, A. A. On graphs whose local subgraphs are pseudogeometric for \(GQ(4, t)\). (English. Russian original) Zbl 1339.05092 Dokl. Math. 91, No. 3, 371-375 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 637-641 (2015). MSC: 05C12 05E30 05C50 PDFBibTeX XMLCite \textit{A. K. Gutnova} and \textit{A. A. Makhnev}, Dokl. Math. 91, No. 3, 371--375 (2015; Zbl 1339.05092); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 637--641 (2015) Full Text: DOI
Bochkarev, S. V. Kolmogorov’s abstract theorem: application to metric spaces and topological groups. (English. Russian original) Zbl 1328.43003 Dokl. Math. 91, No. 3, 367-370 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 633-636 (2015). Reviewer: Elijah Liflyand (Ramat-Gan) MSC: 43A07 42C10 PDFBibTeX XMLCite \textit{S. V. Bochkarev}, Dokl. Math. 91, No. 3, 367--370 (2015; Zbl 1328.43003); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 6, 633--636 (2015) Full Text: DOI
Cherepova, M. F. The Cauchy problem for parabolic equations with unbounded coefficients. (English. Russian original) Zbl 1332.35137 Dokl. Math. 91, No. 3, 364-366 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 529-531 (2015). MSC: 35K15 35K20 35B40 35B45 35A01 PDFBibTeX XMLCite \textit{M. F. Cherepova}, Dokl. Math. 91, No. 3, 364--366 (2015; Zbl 1332.35137); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 529--531 (2015) Full Text: DOI
Saks, R. S. The gradient-of-divergence operator in \(L_2(G)\). (English. Russian original) Zbl 1332.35238 Dokl. Math. 91, No. 3, 359-363 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 524-528 (2015). MSC: 35P05 35P10 47A10 PDFBibTeX XMLCite \textit{R. S. Saks}, Dokl. Math. 91, No. 3, 359--363 (2015; Zbl 1332.35238); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 524--528 (2015) Full Text: DOI
Ratiu, T. S.; Romanov, M. S.; Samokhin, V. N.; Chechkin, G. A. Existence and uniqueness theorems in two-dimensional nematodynamics. Finite speed of propagation. (English. Russian original) Zbl 1330.82055 Dokl. Math. 91, No. 3, 354-358 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 519-523 (2015). Reviewer: Guy Jumarie (Montréal) MSC: 82D30 76A15 35Q35 35Q82 PDFBibTeX XMLCite \textit{T. S. Ratiu} et al., Dokl. Math. 91, No. 3, 354--358 (2015; Zbl 1330.82055); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 519--523 (2015) Full Text: DOI
Leonov, G. A. Method of asymptotic integration for solutions of Lorenz-type systems. (English. Russian original) Zbl 1327.34080 Dokl. Math. 91, No. 3, 352-353 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 517-518 (2015). MSC: 34C37 34A34 PDFBibTeX XMLCite \textit{G. A. Leonov}, Dokl. Math. 91, No. 3, 352--353 (2015; Zbl 1327.34080); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 517--518 (2015) Full Text: DOI
Il’ichev, A. T.; Chugainova, A. P.; Shargatov, V. A. Spectral stability of special discontinuities. (English. Russian original) Zbl 1326.35316 Dokl. Math. 91, No. 3, 347-351 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 512-516 (2015). Reviewer: Santosh Bhattarai (Buffalo) MSC: 35Q53 35B35 PDFBibTeX XMLCite \textit{A. T. Il'ichev} et al., Dokl. Math. 91, No. 3, 347--351 (2015; Zbl 1326.35316); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 512--516 (2015) Full Text: DOI
Astashkin, S. V.; Semenov, E. M. Lebesgue constants of the Walsh system. (English. Russian original) Zbl 1329.42026 Dokl. Math. 91, No. 3, 344-346 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 509-511 (2015). Reviewer: S. F. Lukomskii (Saratov) MSC: 42C10 43A75 PDFBibTeX XMLCite \textit{S. V. Astashkin} and \textit{E. M. Semenov}, Dokl. Math. 91, No. 3, 344--346 (2015; Zbl 1329.42026); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 5, 509--511 (2015) Full Text: DOI
Chetverushkin, B. N.; D’Ascenzo, N.; Saveliev, V. I. Three-level scheme for solving parabolic and elliptic equations. (English. Russian original) Zbl 1325.65145 Dokl. Math. 91, No. 3, 341-343 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 404-407 (2015). MSC: 65N06 35J05 65M06 35K20 65N12 65M12 65Y05 PDFBibTeX XMLCite \textit{B. N. Chetverushkin} et al., Dokl. Math. 91, No. 3, 341--343 (2015; Zbl 1325.65145); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 404--407 (2015) Full Text: DOI
Maksimov, V. I. On guaranteed feedback control of phase field equations with complete and incomplete information. (English. Russian original) Zbl 1354.93062 Dokl. Math. 91, No. 3, 336-340 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 399-403 (2015). MSC: 93B52 91A80 93C15 34H05 PDFBibTeX XMLCite \textit{V. I. Maksimov}, Dokl. Math. 91, No. 3, 336--340 (2015; Zbl 1354.93062); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 399--403 (2015) Full Text: DOI
Korolev, V. Yu.; Korchagin, A. Yu.; Zeifman, A. I. On the convergence of distributions of statistics constructed from samples of random size to a multivariate generalized variance-gamma distributions. (English. Russian original) Zbl 1323.60042 Dokl. Math. 91, No. 3, 332-335 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 394-398 (2015). MSC: 60F05 60G50 62E20 PDFBibTeX XMLCite \textit{V. Yu. Korolev} et al., Dokl. Math. 91, No. 3, 332--335 (2015; Zbl 1323.60042); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 394--398 (2015) Full Text: DOI
Kozlov, N. N. On overlaps of more than two genes: a theorem for homogeneous overlaps. (English. Russian original) Zbl 1349.92110 Dokl. Math. 91, No. 3, 329-331 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 391-393 (2015). MSC: 92D20 92-08 PDFBibTeX XMLCite \textit{N. N. Kozlov}, Dokl. Math. 91, No. 3, 329--331 (2015; Zbl 1349.92110); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 391--393 (2015) Full Text: DOI
Kovyrkina, O. A.; Ostapenko, V. V. On the monotonicity of the CABARET scheme in the multidimensional case. (English. Russian original) Zbl 1326.65108 Dokl. Math. 91, No. 3, 323-328 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 385-390 (2015). MSC: 65M06 35L02 PDFBibTeX XMLCite \textit{O. A. Kovyrkina} and \textit{V. V. Ostapenko}, Dokl. Math. 91, No. 3, 323--328 (2015; Zbl 1326.65108); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 4, 385--390 (2015) Full Text: DOI
Stepin, S. A.; Fufaev, V. V. Phase integral method in the problem of quasiclassical localization of spectra. (English. Russian original) Zbl 1325.34104 Dokl. Math. 91, No. 3, 318-322 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 283-287 (2015). MSC: 34M60 34M03 34B05 PDFBibTeX XMLCite \textit{S. A. Stepin} and \textit{V. V. Fufaev}, Dokl. Math. 91, No. 3, 318--322 (2015; Zbl 1325.34104); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 283--287 (2015) Full Text: DOI
Saks, R. S. Orthogonal subspaces of the space \(L_2(G)\) and self-adjoint extensions of the curl and gradient-of-divergence operators. (English. Russian original) Zbl 1332.35237 Dokl. Math. 91, No. 3, 313-317 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 278-282 (2015). MSC: 35P05 35P15 47A10 PDFBibTeX XMLCite \textit{R. S. Saks}, Dokl. Math. 91, No. 3, 313--317 (2015; Zbl 1332.35237); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 278--282 (2015) Full Text: DOI
Savchuk, A. M.; Sadovnichaya, I. V. The Riesz basis property of generalized eigenspaces for a Dirac system with integrable potential. (English) Zbl 1478.34097 Dokl. Math. 91, No. 3, 309-312 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 274-277 (2015). MSC: 34L40 34L10 46E30 PDFBibTeX XMLCite \textit{A. M. Savchuk} and \textit{I. V. Sadovnichaya}, Dokl. Math. 91, No. 3, 309--312 (2015; Zbl 1478.34097); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 274--277 (2015) Full Text: DOI
Makhnev, A. A.; Paduchikh, D. V.; Tsiovkina, L. Yu. Antipodal distance-regular covers of Hermitian form graphs \(\mathrm{Herm}(2, q^2)\). (English) Zbl 1409.05076 Dokl. Math. 91, No. 3, 304-308 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 268-273 (2015). MSC: 05C12 05C70 PDFBibTeX XMLCite \textit{A. A. Makhnev} et al., Dokl. Math. 91, No. 3, 304--308 (2015; Zbl 1409.05076); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 268--273 (2015) Full Text: DOI
Vasin, V. V. Modified steepest descent method for nonlinear irregular operator equations. (English. Russian original) Zbl 1334.65099 Dokl. Math. 91, No. 3, 300-303 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 264-267 (2015). Reviewer: Zhen Mei (Toronto) MSC: 65J15 47J25 65J20 47J06 PDFBibTeX XMLCite \textit{V. V. Vasin}, Dokl. Math. 91, No. 3, 300--303 (2015; Zbl 1334.65099); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 264--267 (2015) Full Text: DOI
Bobkov, S. G.; Melbourne, J. Localization for infinite-dimensional hyperbolic measures. (English. Russian original) Zbl 1370.46024 Dokl. Math. 91, No. 3, 297-299 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 261-263 (2015). Reviewer: Surjit Singh Khurana (Iowa City) MSC: 46G12 28C20 PDFBibTeX XMLCite \textit{S. G. Bobkov} and \textit{J. Melbourne}, Dokl. Math. 91, No. 3, 297--299 (2015; Zbl 1370.46024); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 3, 261--263 (2015) Full Text: DOI
Khromov, A. P. Mixed problem for the wave equation with arbitrary two-point boundary conditions. (English. Russian original) Zbl 1327.35234 Dokl. Math. 91, No. 3, 294-296 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 148-150 (2015). Reviewer: Lutz Recke (Berlin) MSC: 35L20 35C10 35C15 35A09 PDFBibTeX XMLCite \textit{A. P. Khromov}, Dokl. Math. 91, No. 3, 294--296 (2015; Zbl 1327.35234); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 148--150 (2015) Full Text: DOI
Pyaderkin, M. M. On the stability of the Erdös-Ko-Rado theorem. (English. Russian original) Zbl 1328.05189 Dokl. Math. 91, No. 3, 290-293 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 144-147 (2015). Reviewer: Peter Borg (Malta) MSC: 05D40 60C05 PDFBibTeX XMLCite \textit{M. M. Pyaderkin}, Dokl. Math. 91, No. 3, 290--293 (2015; Zbl 1328.05189); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 144--147 (2015) Full Text: DOI
Kurkina, M. V.; Rodionov, E. D.; Slavskii, V. V. Conformally convex functions and conformally flat metrics of nonnegative curvature. (English. Russian original) Zbl 1408.53022 Dokl. Math. 91, No. 3, 287-289 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 141-143 (2015). MSC: 53B20 53A30 53C21 PDFBibTeX XMLCite \textit{M. V. Kurkina} et al., Dokl. Math. 91, No. 3, 287--289 (2015; Zbl 1408.53022); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 141--143 (2015) Full Text: DOI
Karatsuba, E. A. Fast approximations of certain number-theoretic constants. (English. Russian original) Zbl 1361.11084 Dokl. Math. 91, No. 3, 283-286 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 137-140 (2015). Reviewer: Olaf Ninnemann (Berlin) MSC: 11Y60 11Y35 11M06 65D15 PDFBibTeX XMLCite \textit{E. A. Karatsuba}, Dokl. Math. 91, No. 3, 283--286 (2015; Zbl 1361.11084); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 137--140 (2015) Full Text: DOI
Zheglov, A. B.; Mironov, A. E. On commuting differential operators with polynomial coefficients corresponding to spectral curves of genus one. (English. Russian original) Zbl 1330.13043 Dokl. Math. 91, No. 3, 281-282 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 135-136 (2015). Reviewer: Ahmed Lesfari (El Jadida) MSC: 13N10 14H70 37K10 37K20 PDFBibTeX XMLCite \textit{A. B. Zheglov} and \textit{A. E. Mironov}, Dokl. Math. 91, No. 3, 281--282 (2015; Zbl 1330.13043); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 2, 135--136 (2015) Full Text: DOI
Besov, O. V. Embeddings of Sobolev spaces in the case of the limit exponent. (English. Russian original) Zbl 1344.46029 Dokl. Math. 91, No. 3, 277-280 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 131-134 (2015). MSC: 46E35 46E30 PDFBibTeX XMLCite \textit{O. V. Besov}, Dokl. Math. 91, No. 3, 277--280 (2015; Zbl 1344.46029); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 131--134 (2015) Full Text: DOI
Shishkin, G. I. Standard scheme for a singularly perturbed parabolic convection-diffusion equation with computer perturbations. (English. Russian original) Zbl 1325.65126 Dokl. Math. 91, No. 3, 273-276 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 26-29 (2015). MSC: 65M06 35K20 35B25 PDFBibTeX XMLCite \textit{G. I. Shishkin}, Dokl. Math. 91, No. 3, 273--276 (2015; Zbl 1325.65126); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 26--29 (2015) Full Text: DOI
Soldatov, A. P. Generalized double-layer potentials in anisotropic elasticity on the plane. (English. Russian original) Zbl 1332.35355 Dokl. Math. 91, No. 3, 269-272 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 21-25 (2015). Reviewer: Luisa Fattorusso (Raggio Calabria) MSC: 35Q74 74B05 PDFBibTeX XMLCite \textit{A. P. Soldatov}, Dokl. Math. 91, No. 3, 269--272 (2015; Zbl 1332.35355); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 21--25 (2015) Full Text: DOI
Mikhalev, A. Yu.; Oseledets, I. V. Rectangular submatrices of maximum volume and their computation. (English. Russian original) Zbl 1325.65063 Dokl. Math. 91, No. 3, 267-268 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 19-20 (2015). MSC: 65F30 65F40 PDFBibTeX XMLCite \textit{A. Yu. Mikhalev} and \textit{I. V. Oseledets}, Dokl. Math. 91, No. 3, 267--268 (2015; Zbl 1325.65063); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 19--20 (2015) Full Text: DOI
Kozlov, N. N. Method for computing a genetic code. (English. Russian original) Zbl 1349.92109 Dokl. Math. 91, No. 3, 263-266 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 15-18 (2015). MSC: 92D20 92-08 PDFBibTeX XMLCite \textit{N. N. Kozlov}, Dokl. Math. 91, No. 3, 263--266 (2015; Zbl 1349.92109); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 15--18 (2015) Full Text: DOI
Ishkin, Kh. K. On the Birkhoff-Tamarkin-Langer conditions and a conjecture of Davies. (English. Russian original) Zbl 1329.34135 Dokl. Math. 91, No. 3, 259-262 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 11-14 (2015). Reviewer: Manuel D. de la Iglesia (México D. F.) MSC: 34L05 34B05 34L15 PDFBibTeX XMLCite \textit{Kh. K. Ishkin}, Dokl. Math. 91, No. 3, 259--262 (2015; Zbl 1329.34135); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 11--14 (2015) Full Text: DOI
Iskhokov, S. A.; Gadoev, M. G.; Konstantinova, T. P. Variational Dirichlet problem for degenerate elliptic operators generated by noncoercive forms. (English. Russian original) Zbl 1323.35025 Dokl. Math. 91, No. 3, 255-258 (2015); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 7-10 (2015). MSC: 35J35 35J70 PDFBibTeX XMLCite \textit{S. A. Iskhokov} et al., Dokl. Math. 91, No. 3, 255--258 (2015; Zbl 1323.35025); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 462, No. 1, 7--10 (2015) Full Text: DOI