## Found 626 Documents (Results 1–100)

### On the construction of general solution to an unstable system of differential equations. (English. Russian original)Zbl 07627981

J. Contemp. Math. Anal., Armen. Acad. Sci. 57, No. 5, 296-302 (2022); translation from Izv. Nats. Akad. Nauk Armen., Mat. 57, No. 5, 44-54 (2022).
MSC:  34A30 70H05 85A25
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### On basicity of a certain trigonometric system in a weighted Lebesgue space. (English)Zbl 07626322

MSC:  37Kxx 46Bxx 34Lxx
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MSC:  34C07
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### Limit cycles of planar piecewise linear Hamiltonian differential systems with two or three zones. (English)Zbl 07599847

MSC:  34A36 37G15 34C25
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MSC:  37Jxx
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### A mean-field stochastic linear-quadratic optimal control problem with jumps under partial information. (English)Zbl 07574249

MSC:  93E20 49N10 60H10
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### Optimal spiral-like solutions near a singular extremal in a two-input control problem. (English)Zbl 07536449

MSC:  49J10 49N60 93C05
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### Model order reduction of port-Hamiltonian systems with inhomogeneous initial conditions via approximate finite-time Gramians. (English)Zbl 07488751

MSC:  93Bxx 93Cxx 65Fxx
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### Asymmetric scattering between kinks and wobblers. (English)Zbl 07469357

MSC:  35Qxx 37Kxx 35-XX
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### Lyapunov inequalities of impulsive linear Hamilton system. (Chinese. English summary)Zbl 07448373

MSC:  37J25 15A39
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### Post-processing methods for passivity enforcement. (English)Zbl 1480.93305

Benner, Peter (ed.) et al., Model order reduction. Volume 1: System- and data-driven methods and algorithms. Berlin: De Gruyter. 139-179 (2021).
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### Structure of essential spectrum and discrete spectrum of the energy operator of five-electron systems in the Hubbard model – doublet states. (English)Zbl 1480.81060

Kusraev, Anatoly G. (ed.) et al., Operator theory and differential equations. Selected papers based on the presentations at the 15th conference on order analysis and related problems of mathematical modeling, Vladikavkaz, Russia, July 15–20, 2019. Cham: Birkhäuser. Trends Math., 275-301 (2021).
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### Linear system of differential equations with a quadratic invariant as the Schrödinger equation. (English. Russian original)Zbl 1482.37068

Dokl. Math. 103, No. 1, 39-43 (2021); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 496, 48-52 (2021).
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### Parametric stability of a charged pendulum with an oscillating suspension point. (English)Zbl 1493.70066

MSC:  70H14 70J25 70J40
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### Methods for studying the stability of linear periodic systems depending on a small parameter. (English. Russian original)Zbl 1484.34060

J. Math. Sci., New York 258, No. 1, 115-127 (2021); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 163, 113-126 (2019).
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### Essential spectra of singular Hamiltonian differential operators of arbitrary order under a class of perturbations. (English)Zbl 1489.34121

MSC:  34L05 47E05 47A55
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### Friedrichs extensions of a class of singular Hamiltonian systems. (English)Zbl 07379511

MSC:  47H06 47B25 34B05
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### Parametric stability of a charged pendulum with oscillating suspension point. (English)Zbl 1479.70049

MSC:  70H14 70J40 70J25
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### Optimal robustness of passive discrete-time systems. (English)Zbl 1472.93112

MSC:  93C55 93B35
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### Linear operators associated with differential and difference systems: what is different? (English)Zbl 1472.39040

Baigent, Steve (ed.) et al., Progress on difference equations and discrete dynamical systems. ICDEA 25, London, UK, June 24–28, 2019. Proceedings of the 25th international conference on difference equations and applications. Cham: Springer. Springer Proc. Math. Stat. 341, 435-448 (2020).
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### Existence and multiplicity of periodic solutions for nonautonomous second-order discrete Hamiltonian systems. (English)Zbl 1488.39006

MSC:  39A12 47B39
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### On the stability and instability criteria for circulatory systems: a review. (English)Zbl 1474.70032

MSC:  70J25 70H14
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### Limit point, strong limit point and Dirichlet conditions for discrete Hamiltonian systems. (English)Zbl 1461.39004

MSC:  39A12 39A70 47B25
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### Stability of circulatory systems under viscous friction forces. (English. Russian original)Zbl 1465.70064

Mech. Solids 55, No. 8, 1135-1141 (2020); translation from Prikl. Mat. Mekh. 84, No. 6, 677-686 (2020).
MSC:  70J25 70H14 70E18
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### Indefinite mean-field type linear-quadratic stochastic optimal control problems. (English)Zbl 1451.93418

MSC:  93E20 49N10 60H10
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### Limit cycles of a perturbation of a polynomial Hamiltonian systems of degree 4 symmetric with respect to the origin. (English)Zbl 1451.34033

MSC:  34C07 34C08 34E10
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### Quadratic conservation laws for equations of mathematical physics. (English. Russian original)Zbl 1489.34087

Russ. Math. Surv. 75, No. 3, 445-494 (2020); translation from Usp. Mat. Nauk 75, No. 3, 55-106 (2020).
MSC:  34G10 37J35
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### On the stability of potential systems under the action of non-conservative positional forces. (English)Zbl 1464.70013

MSC:  70J25 70H14
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### Threshold effects in a two-fermion system on an optical lattice. (English. Russian original)Zbl 1445.81019

Theor. Math. Phys. 203, No. 2, 648-663 (2020); translation from Teor. Mat. Fiz. 203, No. 2, 251-268 (2020).
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### Genera of conjoined bases for (non)oscillatory linear Hamiltonian systems: extended theory. (English)Zbl 1447.37086

MSC:  37N35 34A34 34C10
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### Spectra of a class of non-symmetric operators in Hilbert spaces with applications to singular differential operators. (English)Zbl 07220505

MSC:  47B25 34B24
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### On the reducibility of quasiperiodic linear Hamiltonian systems and its applications in Schrödinger equation. (English)Zbl 1444.37045

MSC:  37J06 34C20 34L40
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### Singular Sturmian comparison theorems for linear Hamiltonian systems. (English)Zbl 1442.37114

MSC:  37N35 37J46 93C05
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### Optimal robustness of port-Hamiltonian systems. (English)Zbl 1440.93067

MSC:  93B35 93B70 93B27
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### Foliation of the space $$\mathfrak{sl}^{\ast}(n,\mathbb{R})$$ into coadjoint orbits. (English. Russian original)Zbl 1439.37059

J. Math. Sci., New York 240, No. 5, 678-687 (2019); translation from Zap. Nauchn. Semin. POMI 468, 267-280 (2018).
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### Well-posedness of a class of hyperbolic partial differential equations on the semi-axis. (English)Zbl 07149146

MSC:  93B70 93C20 47D06
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### Lyapunov-type inequalities for a system of nonlinear difference equations. (English)Zbl 1438.26108

MSC:  26D20 39A10
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### Direct characterization of spectral stability of small-amplitude periodic waves in scalar Hamiltonian problems via dispersion relation. (English)Zbl 1426.37053

MSC:  37K45 35Q53 35P05
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### Asymptotic eigenfunctions of the operator $$\nabla D(x)\nabla$$ defined in a two-dimensional domain and degenerating on its boundary and billiards with semi-rigid walls. (English. Russian original)Zbl 1418.37094

Differ. Equ. 55, No. 5, 644-657 (2019); translation from Differ. Uravn. 55, No. 5, 660-672 (2019).
MSC:  37J35 37J05 37D50 53D12 53D25 35P05
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### Time discretization of the spin Calogero-Moser model and the semi-discrete matrix KP hierarchy. (English)Zbl 1419.37066

MSC:  37K10 35Q53 39A12
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### Robust port-Hamiltonian representations of passive systems. (English)Zbl 1411.93056

MSC:  93B35 93C15 37J25 93B40
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### Riccati equations for linear Hamiltonian systems without controllability condition. (English)Zbl 1412.34061

MSC:  34A34 34C10 37J99
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### Singular Sturmian separation theorems on unbounded intervals for linear Hamiltonian systems. (English)Zbl 1408.37107

MSC:  37J45 34C10 37N35
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### Recent development in oscillatory properties of certain differential equations. (English)Zbl 1461.34054

MSC:  34C10 34C20
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### Lower bound of number of limit cycles for a class of piecewise linear Hamiltonian systems under polynomial perturbation. (Chinese. English summary)Zbl 1424.34116

MSC:  34C07 34C05 37J40
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### Computing the nearest stable matrix pairs. (English)Zbl 06986990

MSC:  65F99 90C25
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### Linear port-Hamiltonian descriptor systems. (English)Zbl 1401.37070

MSC:  37K05 65L80 93B17 93B11 93C15 93C05
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