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Beliaev, Dmitry (ed.) et al., International congress of mathematicians 2022, ICM 2022, Helsinki, Finland, virtual, July 6–14, 2022. Volume 4. Sections 5–8. Berlin: European Mathematical Society (EMS). 2696-2717 (2023).

Reviewer: Atsushi Fujioka (Ōsaka)

MSC: 53C42 53A10 49Q05 49J35 58E12 58E20

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Abid, Djamel; Akrout, Kamel; Ghanmi, Abdeljabbar

The multiplicity of solutions for a critical problem involving the fracional \(p\)-Laplacian operator. (English) Zbl 07805673

Bol. Soc. Parana. Mat. (3) 41, Paper No. 115, 11 p. (2023).

MSC: 35P30 35J35 35J60 35J92

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Duan, Chunping; Zhang, Jianjun

Existence and multiplicity of sign-changing solutions for gauged nonlinear Schrödinger systems in \(\mathbb{R}^2\). (English) Zbl 1534.35135

Discrete Contin. Dyn. Syst., Ser. S 16, No. 11, 3057-3083 (2023).

MSC: 35J47 35A01

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Kinoshita, Tomoharu

Existence and multiplicity of radially symmetric solutions for nonlinear Schrödinger equations. (English) Zbl 1534.35104

Topol. Methods Nonlinear Anal. 62, No. 2, 667-692 (2023).

MSC: 35J10 35Q55 35B06 35A01

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Naito, Yūki

Multiplicity of singular solutions to a class of semilinear elliptic equations. (English) Zbl 1533.35138

Mem. Differ. Equ. Math. Phys. 90, 97-110 (2023).

MSC: 35J61 35A01

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Huang, Shao-Yuan; Hsieh, Ping-Han

Exact multiplicity and bifurcation curves of positive solutions of generalized logistic problems. (English) Zbl 07790562

Czech. Math. J. 73, No. 4, 1081-1098 (2023).

MSC: 34B15 34B18 34C23 74G35

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Shokooh, Saeid

Existence of solutions for a sixth-order nonlinear equation. (English) Zbl 1539.34029

Rend. Circ. Mat. Palermo (2) 72, No. 8, 4251-4271 (2023).

Reviewer: Seyfollah Mosazadeh (Kashan)

MSC: 34B24 34B09 58E05

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Colombo, Maria; Crippa, Gianluca; Sorella, Massimo

Anomalous dissipation and lack of selection in the Obukhov-Corrsin theory of scalar turbulence. (English) Zbl 1536.35261

Ann. PDE 9, No. 2, Paper No. 21, 48 p. (2023).

Reviewer: Pierre-Étienne Druet (Darmstadt)

MSC: 35Q35 35Q31 35A02 35F10 35L03 35L65 35D40 35B65 35Q49 76F25 76B03 35K15

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Shen, Xiaohui; Ye, Tiefeng; Shen, Tengfei

Existence and multiplicity of solutions for the Cauchy problem of a fractional Lorentz force equation. (English) Zbl 1543.34008

Bound. Value Probl. 2023, Paper No. 104, 11 p. (2023).

MSC: 34A08 34A12 47H10 37C60 47H11

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Gao, Chenghua; He, Xingyue; Wang, Jingjing

The existence and multiplicity of \(k\)-convex solutions for a coupled \(k\)-Hessian system. (English) Zbl 1538.35186

Acta Math. Sci., Ser. B, Engl. Ed. 43, No. 6, 2615-2628 (2023).

MSC: 35J96 35J47

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Bieganowski, Bartosz; Konysz, Adam

Elliptic problems with mixed nonlinearities and potentials singular at the origin and at the boundary of the domain. (English) Zbl 1527.35366

J. Fixed Point Theory Appl. 25, No. 4, Paper No. 83, 16 p. (2023).

MSC: 35Q55 35Q41 35A15 35J20 58E05 35B38 78A60 35R09

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Abita, Rahmoune; Biccari, Umberto

Multiplicity of solutions for fractional \(q(\cdot)\)-Laplacian equations. (English) Zbl 1531.35345

J. Elliptic Parabol. Equ. 9, No. 2, 1101-1129 (2023).

MSC: 35R11 35J25 35J92 74G35

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Figueiredo, Giovany M.; Siciliano, Gaetano

Multiple solutions for a Schrödinger-Bopp-Podolsky system with positive potentials. (English) Zbl 1523.35011

Math. Nachr. 296, No. 6, 2332-2351 (2023).

MSC: 35A15 35B25 35J48 35J50 35J61 58E05

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Hu, Jiaqing; Mao, Anmin

Normalized solutions to nonlocal Schrödinger systems with \(L^2\)-subcritical and supercritical nonlinearities. (English) Zbl 1522.35211

J. Fixed Point Theory Appl. 25, No. 3, Paper No. 77, 26 p. (2023).

MSC: 35J47 35J62 35A01 35A15

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Ricceri, Biagio

A further multiplicity result for Lagrangian systems of relativistic oscillators. (English) Zbl 1518.34013

Appl. Anal. Optim. 7, No. 2, 135-140 (2023).

MSC: 34A34 34C25 49J35 49J40

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Ye, Tiefeng

Multiple solutions of a nonlinear elastic beam equation supported at two ends. (English) Zbl 1538.34093

Differ. Integral Equ. 36, No. 9-10, 757-774 (2023).

Reviewer: Manfred Möller (Johannesburg)

MSC: 34B15 74K10

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Gasiński, Leszek; Papageorgiou, Nikolaos S.

Singular equations with variable exponents and concave-convex nonlinearities. (English) Zbl 1522.35187

Discrete Contin. Dyn. Syst., Ser. S 16, No. 6, 1414-1434 (2023).

Reviewer: Calogero Vetro (Palermo)

MSC: 35J20 35J60 35J25 35A01

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Oshri, Oz

Modeling the behavior of an extensible sheet in a pressurized chamber. (English) Zbl 1524.74140

J. Elasticity 153, No. 4-5, 549-570 (2023).

MSC: 74G05 74G35 74G60 74G65

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Fareh, Soraya; Akrout, Kamel; Ghanmi, Abdeljabbar; Repovš, Dušan D.

Multiplicity results for fractional Schrödinger-Kirchhoff systems involving critical nonlinearities. (English) Zbl 1518.35628

Adv. Nonlinear Anal. 12, Article ID 20220318, 16 p. (2023).

MSC: 35R11 35J35 35J62 35P30

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Zhang, Lihong; Zhang, Yu; Wang, Guotao; Ahmad, Bashir

The multiplicity of radial \(k\)-convex solutions for an augmented Hessian equation. (English) Zbl 1519.35133

J. Math. Anal. Appl. 527, No. 1, Part 1, Article ID 127408, 12 p. (2023).

MSC: 35J60 35J96 35A01

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Li, Yangyang

An improved Morse index bound of min-max minimal hypersurfaces. (English) Zbl 1521.58004

Calc. Var. Partial Differ. Equ. 62, No. 6, Paper No. 179, 32 p. (2023).

Reviewer: Giorgio Saracco (Firenze)

MSC: 58E12 49Q05 49J35 53A10

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Zhu, Qinghao; Qi, Jianming

Critical fractional \(p\)-Laplacian system with negative exponents. (English) Zbl 1517.35251

J. Funct. Spaces 2023, Article ID 9014456, 11 p. (2023).

MSC: 35R11 35J57 35J92

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Shokooh, Saeid

Variational techniques for a system of Sturm-Liouville equations. (English) Zbl 1521.34021

J. Elliptic Parabol. Equ. 9, No. 1, 595-610 (2023).

Reviewer: Rodica Luca (Iaşi)

MSC: 34B09 47J30 58E50

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Fang, Xiang-Dong; Liu, Mei-Qi

Localized solutions of higher topological type for semiclassical generalized quasilinear Schrödinger equations. (English) Zbl 1512.35200

Z. Angew. Math. Phys. 74, No. 2, Paper No. 81, 22 p. (2023).

MSC: 35J20 35J62 35Q55

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Georgiev, Svetlin G.; Tikare, Sanket; Kumar, Vipin

Existence of solutions for two-point integral boundary value problems with impulses. (English) Zbl 1521.34027

Qual. Theory Dyn. Syst. 22, No. 3, Paper No. 97, 20 p. (2023).

Reviewer: Jan Tomeček (Olomouc)

MSC: 34B37 34B10 47H10 34B18

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Fu, Peiyuan; Xia, Aliang

Existence and multiplicity results for a critical superlinear fractional Ambrosetti-Prodi type problem. (English) Zbl 1511.35179

Commun. Nonlinear Sci. Numer. Simul. 120, Article ID 107174, 14 p. (2023).

MSC: 35J67 35R11 35A01 35A15

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Feng, Miao; Jiang, Jifa

A stage structured predator-prey model with periodic orbits. (English) Zbl 1517.34064

Discrete Contin. Dyn. Syst., Ser. B 28, No. 4, 2846-2883 (2023).

MSC: 34C60 34C05 34D20 34C23 92D25

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Wang, Qun; Qian, Aixia

Normalized solutions to the Schrödinger-Poisson-Slater equation with general nonlinearity: mass supercritical case. (English) Zbl 1512.35556

Anal. Math. Phys. 13, No. 2, Paper No. 35, 37 p. (2023).

MSC: 35Q55 35Q41 35B09 35J20 35A15 35B33

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Abdellaoui, B.; Attar, A.; Boukarabila, Y. O.; Laamri, E. -H.

Multiplicity results for nonlocal critical problems involving Hardy potential in the whole space. (English) Zbl 1510.35362

Complex Var. Elliptic Equ. 68, No. 3, 461-497 (2023).

MSC: 35R11 35B65 35J61 47G20

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Zhao, Leiga; Cai, Hongrui; Chen, Yutong

Multiple nontrivial solutions of superlinear fractional Laplace equations without (AR) condition. (English) Zbl 1512.35284

Adv. Nonlinear Anal. 12, Article ID 20220281, 14 p. (2023).

MSC: 35J61 35R11 35A01

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Zhang, Wen; Zhang, Jian; Rădulescu, Vicenţiu D.

Concentrating solutions for singularly perturbed double phase problems with nonlocal reaction. (English) Zbl 1505.35024

J. Differ. Equations 347, 56-103 (2023).

MSC: 35B25 35A15 35B09 35J92 58E05

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Shuai, Wei

Two sequences of solutions for the semilinear elliptic equations with logarithmic nonlinearities. (English) Zbl 1505.35185

J. Differ. Equations 343, 263-284 (2023).

MSC: 35J61 35A01 35A15

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Zhao, Kaihong

Local exponential stability of several almost periodic positive solutions for a classical controlled GA-predation ecosystem possessed distributed delays. (English) Zbl 1510.92194

Appl. Math. Comput. 437, Article ID 127540, 13 p. (2023).

MSC: 92D25 92D40 34D20 34K14

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Luo, Ying; Guo, Fei

Infinitely many rotating periodic solutions for local superquadratic damped Hamiltonian systems with sublinear impulsive effects. (English) Zbl 1508.37077

J. Math. Anal. Appl. 519, No. 1, Article ID 126800, 15 p. (2023).

MSC: 37J46 34A37

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Guan, Wen; Wang, Da-Bin

Multiple positive bound state solutions for fractional Schrödinger-Poisson system with critical growth. (English) Zbl 1501.35169

Adv. Differ. Equ. 28, No. 3-4, 217-246 (2023).

MSC: 35J47 35R11 35J61 35A01 35J50

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Ochal, Anna; Prządka, Wiktor; Sofonea, Mircea; Tarzia, Domingo A.

Modelling, Analysis and Numerical Simulation of a Spring-Rods System with Unilateral Constraints. arXiv:2309.04365

Preprint, arXiv:2309.04365 [math.NA] (2023).

MSC: 74K10 74K05 74M15 74G35 74G30 74G15 49J40

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Colasuonno, Francesca

Multiple solutions for asymptotically \(q\)-linear \((p, q)\)-Laplacian problems. (English) Zbl 1529.35262

Math. Methods Appl. Sci. 45, No. 14, 8655-8673 (2022); corrigendum ibid. 47, No. 4, 2500-2502 (2024).

MSC: 35J92 35A01 35J20

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Huang, Shao-Yuan; Hsieh, Ping-Han

Bifurcation diagrams for two-point boundary value problem with quadratic nonlinearity. (English) Zbl 1514.34049

Appl. Math. E-Notes 22, 252-264 (2022).

MSC: 34B15 34B18 34C23 74G35

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Ling, Rumin; Lu, Mingxi; Feng, Yuncheng; Xiao, Huafeng

Multiplicity and minimality of periodic solutions to fourth-order super-quadratic difference systems. (English) Zbl 1505.39009

Open Math. 20, 1629-1641 (2022).

MSC: 39A23

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Yang, Rui

Multiplicity and Calabi-Bernstein type asymptotic property of positive solutions for one-dimensional Minkowski-curvature problems. (English) Zbl 1519.34020

J. Fixed Point Theory Appl. 24, No. 4, Paper No. 82, 25 p. (2022).

Reviewer: Alberto Cabada (Santiago de Compostela)

MSC: 34B16 34B18 34B09 47N20

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Peng, Xueqin; Jia, Gao; Huang, Chen

Sign-changing solutions for modified Schrödinger-Poisson system with general nonlinearity. (English) Zbl 1501.35176

Complex Var. Elliptic Equ. 67, No. 11, 2770-2794 (2022).

MSC: 35J47 35J61 35A01

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Feng, Mei-qiang

A class of singular coupled systems of superlinear Monge-Ampère equations. (English) Zbl 1500.35194

Acta Math. Appl. Sin., Engl. Ser. 38, No. 4, 925-942 (2022).

MSC: 35J96 35J25 35A01 35B40

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Golovaty, Yuriy

Membranes with thin and heavy inclusions: asymptotics of spectra. (English) Zbl 1498.35529

Asymptotic Anal. 130, No. 1-2, 23-51 (2022).

MSC: 35Q74 74H45 35P20 35B40 35B25

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Ricceri, Biagio

Addendum to “A more complete version of a minimax theorem”. (English) Zbl 1498.49012

Appl. Anal. Optim. 6, No. 2, 195-197 (2022).

MSC: 49J35 49K35 90C47 35J92

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Yu, Fang; Chen, Wen Jing

A Kirchhoff problem with singular exponential critical growth in \(\mathbb{R}^N\). (Chinese. English summary) Zbl 1513.35189

Acta Math. Sin., Chin. Ser. 65, No. 1, 1-14 (2022).

MSC: 35J20 35J60 35J62

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Liu, Yan; Guo, Fei

Multiplicity of periodic solutions for second-order perturbed Hamiltonian systems with local superquadratic conditions. (English) Zbl 1505.37069

Commun. Pure Appl. Anal. 21, No. 10, 3247-3261 (2022).

MSC: 37J40 37J46 70H09 70H12

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Wang, Lixiong; Chen, Haibo; Liu, Senli

Existence and multiplicity of sign-changing solutions for a Schrödinger-Bopp-Podolsky system. (English) Zbl 1498.35239

Topol. Methods Nonlinear Anal. 59, No. 2B, 913-940 (2022).

MSC: 35J48 35J20 35B40

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Son, Byungjae; Sim, Inbo

Analysis of positive solutions to one-dimensional generalized double phase problems. (English) Zbl 1509.34024

Adv. Nonlinear Anal. 11, 1365-1382 (2022).

Reviewer: Yang Yang (Wuxi)

MSC: 34B18 47N20

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Shen, Yansheng

Multiplicity of positive solutions to a critical fractional equation with Hardy potential and concave-convex nonlinearities. (English) Zbl 1495.35203

Complex Var. Elliptic Equ. 67, No. 9, 2152-2180 (2022).

MSC: 35R11 35A15 35J25 35J61 45G05 47G20 49J35

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Ding, Yanheng; Yu, Yuanyang; Dong, Xiaojing

Multiplicity and concentration of semi-classical solutions to nonlinear Dirac-Klein-Gordon systems. (English) Zbl 1492.35240

Adv. Nonlinear Stud. 22, 248-272 (2022).

MSC: 35Q40 49J35

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Zhang, Jian; Zhang, Wen; Rădulescu, Vicenţiu D.

Double phase problems with competing potentials: concentration and multiplication of ground states. (English) Zbl 1497.35029

Math. Z. 301, No. 4, 4037-4078 (2022).

Reviewer: Youssef Jabri (Oujda)

MSC: 35B25 35A15 35B09 35J20 35J92 58E05

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do Ó, João Marcos; Shamarova, Evelina; da Silva, Esteban

Singular solutions to \(k\)-Hessian equations with fast-growing nonlinearities. (English) Zbl 1494.35024

Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 222, Article ID 113000, 38 p. (2022).

MSC: 35B32 35A24 35J25 35J62 35J92 35P30

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Found 1,250 Documents (Results 1–100)

Existence and multiplicity of blow-up profiles for a quasilinear diffusion equation with source. (English) Zbl 07967641

Existence and multiplicity for fractional differential equations with \(m(\xi)\)-Kirchhoff type-equation. (English) Zbl 07959235

Bifurcation curves for the one-dimensional perturbed Gelfand problem with the Minkowski-curvature operator. (English) Zbl 07957298

Ground state solutions for Kirchhoff equations via modified Nehari-Pankov manifold. (English) Zbl 07970746

Multiplicity of positive solutions for a third-order boundary value problem with nonlocal conditions of integral type. (English) Zbl 07959667

The theory of solution for a class of nonlinear telegraph systems with a parameter. (Chinese. English summary) Zbl 07959386

Abstract multiplicity results for \((p, q)\)-Laplace equations with two parameters. (English) Zbl 07951505

Bifurcation curve for the Minkowski-curvature equation with concave or geometrically concave nonlinearity. (English) Zbl 07946113

On critical Ambrosetti-Prodi type problems involving mixed operator. (English) Zbl 07944353

Multiple normalized solutions to Schrödinger equations in \(\mathbb{R}^N\) with critical growth and potential. (English) Zbl 07936974

Multiplicity of normalized solutions for dipolar Gross-Pitaevskii equation with a mass subcritical perturbation. (English) Zbl 07936967

Multiplicity of normalized semi-classical states for a class of nonlinear Choquard equations. (English) Zbl 07936895

On existence of multiple normalized solutions to a class of elliptic problems in whole \(\mathbb{R}^N\) via penalization method. (English) Zbl 07935783

Multiplicity of solutions for fractional \(\kappa (X)\)-Laplacian equations. (English) Zbl 07924014

A multiplicity result for critical elliptic problems involving differences of local and nonlocal operators. (English) Zbl 07922262

Multiplicity and concentration of positive solutions to the double phase Kirchhoff type problems with critical growth. (English) Zbl 07922253

Multiplicity and symmetry breaking for supercritical elliptic problems in exterior domains. (English) Zbl 1547.35359

Multiple normalized solutions for the non-autonomous \(p\)-Laplace equation. (English) Zbl 1547.35378

Topics in elliptic problems: from semilinear equations to shape optimization. (English) Zbl 1547.35007

High multiplicity of positive solutions in a superlinear problem of Moore-Nehari type. (English) Zbl 07900535

Bifurcation and regularity of entire solutions for the planar nonlinear Schrödinger-Poisson system. (English) Zbl 07892692

On the dynamics of an epidemic patch model with mass-action transmission mechanism and asymmetric dispersal patterns. (English) Zbl 07883987

Multiplicity of positive solutions to a class of Schrödinger-type singular problems. (English) Zbl 1541.35158

Multiplicity results for bound state solutions of a semilinear equation. (English) Zbl 07856340

Multiplicity of normalized solutions for Schrödinger equation with mixed nonlinearity. (English) Zbl 1540.35142

Corrigendum to: “Multiple solutions for asymptotically \(q\)-linear \((p, q)\)-Laplacian problems”. (English) Zbl 1539.35117

Homoclinic solutions for a class of perturbed fractional Hamiltonian systems with subquadratic conditions. (English) Zbl 1546.37111

On multiplicity and concentration for a magnetic Kirchhoff-Schrödinger equation involving critical exponents in \(\mathbb{R}^2\). (English) Zbl 1539.35095

A multiplicity result in finite-dimensional vector spaces. (English) Zbl 1539.39011

Multi-peak positive solutions for a logarithmic Schrödinger equation via variational methods. (English) Zbl 1541.35151

Boundary value problems associated with Hamiltonian systems coupled with positively-\((p, q)\)-homogeneous systems. (English) Zbl 1541.37069

Multiplicity and concentration of solutions for a Choquard equation with critical exponential growth in \(\mathbb{R}^N\). (English) Zbl 1542.35179

Uniform decay rates for a semilinear wave equation with boundary damping involving variable exponents. (English) Zbl 07830522

Existence and multiplicity of normalized solutions with positive energy for the Kirchhoff equation. (English) Zbl 1541.35237

Theory and computation of radial solutions for Neumann problems with \(\phi\)-Laplacian. (English) Zbl 1534.35187

Multiplicity and stability of normalized solutions to non-autonomous Schrödinger equation with mixed non-linearities. (English) Zbl 1534.35106

A global branch approach to normalized solutions for the Schrödinger equation. (English. French summary) Zbl 1534.35102

Prescribing Chern scalar curvatures on noncompact manifolds. (English) Zbl 1533.35142

Multiplicity of neutrally stable periodic orbits with coexistence in the chemostat subject to periodic removal rate. (English) Zbl 1534.34054

A coupled Hartree system with Hardy-Littlewood-Sobolev critical exponent: existence and multiplicity of high energy positive solutions. (English) Zbl 1535.35067

Positive radial solutions for Dirichlet problems in the ball. (English) Zbl 1533.35185

Multiplicity of solutions to a Schrödinger problem with square diffusion term. (English) Zbl 1526.35176

Global Bifurcation Curve for Fourth-Order MEMS/NEMS Models with Clamped Boundary Conditions. arXiv:2412.18427

On a system of coupled nonlocal singular fractional boundary value problems with \(\delta \)-Laplacian operators. (English) Zbl 07919783

Multiplicity theorems involving functions with non-convex range. (English) Zbl 07897316

Positive solutions for a Schrödinger-Bopp-Podolsky system. (English) Zbl 1544.35027

Nonlinearities with zeros for Laplacian, \(p \)-Laplacian and poly-Laplacian. (English) Zbl 07852538

The multiplicity of positive solutions for a certain logistic problem. (English) Zbl 1534.34036

Mean curvature and variational theory. (English) Zbl 07822631

The multiplicity of solutions for a critical problem involving the fracional \(p\)-Laplacian operator. (English) Zbl 07805673

Existence and multiplicity of sign-changing solutions for gauged nonlinear Schrödinger systems in \(\mathbb{R}^2\). (English) Zbl 1534.35135

Existence and multiplicity of radially symmetric solutions for nonlinear Schrödinger equations. (English) Zbl 1534.35104

Multiplicity of singular solutions to a class of semilinear elliptic equations. (English) Zbl 1533.35138

Exact multiplicity and bifurcation curves of positive solutions of generalized logistic problems. (English) Zbl 07790562

Existence of solutions for a sixth-order nonlinear equation. (English) Zbl 1539.34029

Anomalous dissipation and lack of selection in the Obukhov-Corrsin theory of scalar turbulence. (English) Zbl 1536.35261

Existence and multiplicity of solutions for the Cauchy problem of a fractional Lorentz force equation. (English) Zbl 1543.34008

The existence and multiplicity of \(k\)-convex solutions for a coupled \(k\)-Hessian system. (English) Zbl 1538.35186

Elliptic problems with mixed nonlinearities and potentials singular at the origin and at the boundary of the domain. (English) Zbl 1527.35366

Multiplicity of solutions for fractional \(q(\cdot)\)-Laplacian equations. (English) Zbl 1531.35345

Multiple solutions for a Schrödinger-Bopp-Podolsky system with positive potentials. (English) Zbl 1523.35011

Normalized solutions to nonlocal Schrödinger systems with \(L^2\)-subcritical and supercritical nonlinearities. (English) Zbl 1522.35211

A further multiplicity result for Lagrangian systems of relativistic oscillators. (English) Zbl 1518.34013

Multiple solutions of a nonlinear elastic beam equation supported at two ends. (English) Zbl 1538.34093

Singular equations with variable exponents and concave-convex nonlinearities. (English) Zbl 1522.35187

Modeling the behavior of an extensible sheet in a pressurized chamber. (English) Zbl 1524.74140

Multiplicity results for fractional Schrödinger-Kirchhoff systems involving critical nonlinearities. (English) Zbl 1518.35628

The multiplicity of radial \(k\)-convex solutions for an augmented Hessian equation. (English) Zbl 1519.35133

An improved Morse index bound of min-max minimal hypersurfaces. (English) Zbl 1521.58004

Critical fractional \(p\)-Laplacian system with negative exponents. (English) Zbl 1517.35251

Variational techniques for a system of Sturm-Liouville equations. (English) Zbl 1521.34021

Localized solutions of higher topological type for semiclassical generalized quasilinear Schrödinger equations. (English) Zbl 1512.35200

Existence of solutions for two-point integral boundary value problems with impulses. (English) Zbl 1521.34027