## Found 132 Documents (Results 1–100)

100
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MSC:  34L99

### On the boundary value problems for a class of ordinary differential equations with turning points. (English)Zbl 0618.34051

Reviewer: N.L.Maria
MSC:  34E20
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### On existence of periodic solutions for nonlinearly perturbed conservative systems. (English)Zbl 0599.34048

Differential equations, Proc. 8th Fall Conf., Okla. State Univ. 1979, 103-114 (1980).
MSC:  34C25 34A34

### Searching a fifth order method for the numerical integration of a second order ordinary differential equation. (Italian)Zbl 0581.65056

MSC:  65L05 34A34 65L20

### On the solvability of symmetric positive systems in a domain with non- exceptional corners. (Chinese. English summary)Zbl 0577.35007

MSC:  35F15 35A05 35M99

### The coherent potential approximation in random field theorems. (English)Zbl 0555.73010

Continuum models of discrete systems, Proc. 3rd int. Symp., Freudenstadt/Ger. 1979, SM Stud. Ser. 15, 415-422 (1980).
MSC:  74A40 35R60 74F15

### Capacity and a generalized maximum principle for quasilinear elliptic equations. (English. Russian original)Zbl 0553.35026

Sov. Math., Dokl. 21, 320-322 (1980); translation from Dokl. Akad. Nauk SSSR 250, 1318-1320 (1980).
MSC:  35J60 35B50 53A10

### Regularized asymptotic solutions to equations with a regular singular point. (Russian)Zbl 0546.34048

Tr. Mosk. Ehnerg. Inst. 499, 147-151 (1980).
MSC:  34E05 34C05

MSC:  34A05

### The improved WKB-approximation in the neighbourhood of the turning point. (Russian)Zbl 0511.34041

Asymptotic methods in system theory, Collect. Artic., Irkutsk 1980, 203-207 (1980).
MSC:  34E20 34A45

### On a boundary value problem for a mixed-parabolic equation with nonlocal initial conditions. II. (Bulgarian)Zbl 0503.35041

MSC:  35K15 35M99 35A05

### On a boundary value problem for a mixed-parabolic equation with non-local initial conditions. I. (Bulgarian)Zbl 0503.35040

MSC:  35K15 35M99 35A05

### Asymptotic formulas for the eigenfunctions of a singular second order differential operator. (Russian)Zbl 0499.35085

Correct boundary value problems for non-classical equations of mathematical physics, Collect. Artic., Novosibirsk 1980, 93-97 (1980).
MSC:  35P20 35J05

### Dirichlet problem for a class of elliptic systems in the plane. (Russian)Zbl 0499.35044

Correct boundary value problems for non-classical equations of mathematical physics, Collect. Artic., Novosibirsk 1980, 68-71 (1980).
MSC:  35J55 35F05 35A05

### Equations of mathematical physics. Transl. from the Russian by V. M. Volosov and I. G. Volosova. (English)Zbl 0499.35002

Moskva: ”Mir”. 318 p. (1980).

### Behaviour of solutions of a problem with a shift for the Lavrent’ev- Bitsadze equation in the case of variation of the domain. (Russian)Zbl 0498.35060

Correct boundary value problems for non-classical equations of mathematical physics, Collect. Artic., Novosibirsk 1980, 155-159 (1980).

### On the complete investigation of the problem about ”isochronous rockets”. (Russian)Zbl 0497.90095

MSC:  91A24 91A23

### Existence, uniqueness, and boundedness of the solutions of a mixed problem for parabolic equations with time delay. (Russian)Zbl 0497.35081

MSC:  35R10 35K20 35D05 35A35 35B35 35B10

### The perturbation of a second order differential equation with the regular singular point. (Russian)Zbl 0497.34042

Investigations on integro-differential equations, 13, Collect. Artic. Frunze 1980, 253-255 (1980).

### On a nonlinear degenerate first order operator equation. (Russian)Zbl 0492.34050

Correct boundary value problems for non-classical equations of mathematical physics, Collect. Artic., Novosibirsk 1980, 64-68 (1980).

### The solution of the periodic problem for a second order ordinary differential equation with a small parameter in the higher derivative. (Russian)Zbl 0489.34012

Differential equations with small parameter, Collect. Artic., Sverdlovsk 1980, 111-117 (1980).
MSC:  34B05 34C25

### On differential equations of the second order with retarded argument in a Banach space. (Russian)Zbl 0487.34087

Qualitative study on functional-differential equations, Collect. sci. Works, Kiev 1980, 50-55 (1980).
MSC:  34K30 34A12 34K05

### On parabolic means. (English. Russian original)Zbl 0484.35051

Sov. Math., Dokl. 21, 741-746 (1980); translation from Dokl. Akad. Nauk SSSR 252, 296-301 (1980).

### The asymptotic representation of the solution for partial differential equations with time lag. (Russian)Zbl 0475.35076

Analytical methods in the study of nonlinear oscillations, Collect. sci. Works, Kiev 1980, 155-160 (1980).

### A spectral mapping theorem for generating operators in second-order linear differential equations. (English)Zbl 0474.47021

MSC:  47E05 47A60 34G10
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### On a hyperbolic modification of the Burgers equation. (English. Russian original)Zbl 0473.35067

Sov. Math., Dokl. 22, 758-761 (1980); translation from Dokl. Akad. Nauk SSSR 255, 801-804 (1980).

### Time periodic but spatially irregular solutions to a model reaction- diffusion equation. (English)Zbl 0473.35011

Nonlinear dynamics, int. Conf., New York 1979, Ann. N.Y. Acad. Sci. 357, 397-409 (1980).

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### On the connection between spectral and oscillatory properties of the matrix Jacobi problem. (Russian)Zbl 0468.70021

Dynamics and stability of mechanical systems, Collect. sci. Works, Kiev 1980, 156-161 (1980).

### Integral representations and boundary value problems for some differential equations with singular line or singular surfaces. Textbook for a special course. Part 1. (Integral’nye predstavleniya i granichnye zadachi dlya nekotorykh differentsial’nykh uravnenij s singulyarnoj liniej ili singulyarnymi poverkhnostyami. Uchebnoe posobie po spetskursu. Chast’ 1). (Russian)Zbl 0468.35019

Ministerstvo Vysshego i Srednego Spetsial’nogo Obrazovaniya Tadzhikskoj SSR. Dushanbe: Tadzhikskij Gosudarstvennyj Universitet im. V. I. Lenina. 127 p. R. 0.75 (1980).

### Parabolic interior Schauder estimates by the maximum principle. (English)Zbl 0468.35014

MSC:  35B50 35K20 35R45
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### On the solution of plane boundary value problems of the heat conductivity on combined mathematical models. (Russian)Zbl 0465.35044

Mathematical methods of the study of physical fields, Collect. sci. Works, Kiev 1980, 136-141 (1980).

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### On a nonlinear stochastic boundary value problem for an equation of hyperbolic type. (Russian)Zbl 0463.60053

Boundary value problems for differential equations, Collect. sci. Works, Kiev 1980, 53-60 (1980).
MSC:  60H15 35R60 35L20

### Résolution generique d’une équation semi-linéaire. (French)Zbl 0461.35037

MSC:  35J65 35J20 35A05 49K20

### Riemann-Funktionen als Lösungen partieller Differentialgleichungssysteme. (German)Zbl 0461.35018

Ber. Math.-Stat. Sekt. Forschungszent. Graz 136, 28 S. (1980).
MSC:  35C15 35C99 35L15

### Stochasticity and order in a linear quasiperiodic differential equation. (English)Zbl 0459.65063

IPP Ber., Ser. 6, 204, 13 p. (1980).
MSC:  65L10 34B30

### Method of contracting compact sets for the solution of nonlinear differential equations. (English. Russian original)Zbl 0459.65054

Mosc. Univ. Comput. Math. Cybern. 1980, No. 4, 8-13 (1980); translation from Vestn. Mosk. Univ., Ser. XV 1980, No. 4, 8-13 (1980).
MSC:  65L05

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### Eine Verallgemeinerung der Poincareschen Methode auf gewisse Klassen von Integro-Differentialgleichungen. (Russian)Zbl 0459.45009

MSC:  45J05 45L05

### Similarity solutions of some two-space-dimensional nonlinear wave evolution equations. (English)Zbl 0459.35077

MSC:  35Q99 35K55 35L70
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### On the behavior of the solutions of degenerating quasi-linear parabolic equations of second order. (Russian)Zbl 0459.34015

MSC:  34C05 34A34

### A homogeneous statistical solution of a nonlinear hyperbolic equation. (English)Zbl 0457.35061

MSC:  35L70 35R60

### On a certain boundary value problem for a degenerating hyperbolic equation. (Russian)Zbl 0456.35063

MSC:  35M99 35L20 35L80

### Coercive solvability of a boundary value problem for a complete degenerate second order differential equation in Hilbert space. (English. Russian original)Zbl 0456.35037

Transl., Ser. 2, Am. Math. Soc. 115, 175-185 (1980); translation from Mathematical programming and related questions. Proc. Seventh Winter Sch., Drogobych, 1974: Theory Oper. Linear Spaces, Cent. Ehkon.-Mat. Inst. Akad. Nauk SSSR, Mosc., 168-184 (1976).
MSC:  35J70 35B45 46E35
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### Un problema ai limiti per un’equazione differenziale astratta del secondo ordine, con coefficienti operatoriali variabili. (Italian)Zbl 0456.34017

MSC:  34B05 34B27 34A30

### Höhere Analysis. 2., verb. Aufl. Lizenzausg. (German)Zbl 0455.47035

Thun, Frankfurt am Main: Verlag Harri Deutsch. 704 S., 42 Abb. DM 29.80 (1980).

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MSC:  74S30
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### Ein Beispiel eines nichtklassischen Randwertproblems für die Gleichung der Schwingungen einer Saite. (Russian)Zbl 0452.35071

MSC:  35L20 35L05 35Q99

### Group theoretical aspects of solutions to a two dimensional steady-state heat equation. (English)Zbl 0452.35048

MSC:  35K05 35J15 31B35

### Almost periodic solutions of a non-linear second order hyperbolic equation in a Hilbert space. (English)Zbl 0452.35004

MSC:  35B15 35L70 47H10

### Strict convexity, strong ellipticity, and regularity in the calculus of variations. (English)Zbl 0451.35028

MSC:  35J15 52A20 49J20
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### A variation of Kneser’s theorem and boundary value problems. (English)Zbl 0451.34014

MSC:  34B15 34B10 34A34
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### Variational methods and almost solvability of semilinear equations. (English)Zbl 0449.35035

Rapp., Semin. Math. Appl. Mec., Univ. Cathol. Louvain 133, 8 p. (1980).

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### A modified two-time method for the dynamic transitions of bifurcation. (English)Zbl 0448.35010

MSC:  35B32 35L70 35Q99
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### One-sided difference schemes and transonic flow. (English)Zbl 0446.76055

Computing methods in applied sciences and engineering, Proc. 4th int. Symp., Versailles 1979, 153-156 (1980).
MSC:  76H05 65N99 65Z05

### A note on sampling from stochastic differential equation model. (English)Zbl 0446.62087

MSC:  62M05 60H10 62M10

### Eigenfunctions of expected value operators in the Wishart distribution. (English)Zbl 0446.62046

MSC:  62H10 62H99 45C05
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### Application of Milutin-Dubovicki’s method to solving an optimal control problem for hyperbolic systems. (English)Zbl 0446.49016

MSC:  49K20 93C05 35L20

### Über die klassische Lösung des mehrdimensionalen Stefanproblems für quasilineare parabolische Gleichungen. (Russian)Zbl 0446.35056

MSC:  35K20 35R35
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### Liaison entre équations différentielles de type Schrödinger reduit et équations de champs non linéaires. (French)Zbl 0446.35036

MSC:  35J10 35A25 35A05 35B10

### A new time invariant for heat conduction with finite wave speed. (English)Zbl 0444.35073

MSC:  35Q99 35L10 80A20
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### Symmetry properties and isolated singularities of positive solutions of nonlinear elliptic equations. (English)Zbl 0444.35038

Nonlinear partial differential equations in engineering and applied science, Proc. Conf., Kingston 1979, Lect. Notes Pure Appl. Math. 54, 255-273 (1980).
MSC:  35J60 35B50 35A20

MSC:  34C11
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### Critical points of indefinite functionals and periodic solutions of differential equations. (English)Zbl 0443.35044

Proc. int. Congr. Math., Helsinki 1978, Vol. 2, 791-796 (1980).

### Cauchy problem for a degenerating second-order operator equation. (English)Zbl 0443.34056

MSC:  34G10 47E05
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### A difference method to solve a Sturm-Liouville problem with degeneration at the boundary. I. (Russian)Zbl 0442.65076

MSC:  65L15 34L99

MSC:  34C25
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### A hyperbolic equation with double characteristics which has a solution with branching singularities. (English)Zbl 0441.35040

MSC:  35L15 35L67 35A20

MSC:  90B99
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### Unicité forte à partir d’une variété de dimension quelconque pour des inégalités différentielles elliptiques. (French)Zbl 0439.35024

Sémin. Goulaouic-Schwartz 1979-1980, Équat. dériv. part., Exposé No. 20, 9 p. (1980).
MSC:  35J15 35R45 35A05 58J10
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### On the solution of a differential equation of second order and its application to the heat conduction problem in piecewise homogeneous multilayer bodies. (Russian)Zbl 0439.34015

MSC:  34A99 74J99 80A20

### Existence and uniqueness of solutions of system governed by second order quasilinear integro-partial differential equation of parabolic type. (English)Zbl 0438.45009

MSC:  45K05 35K05
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