DEEP-MATH / Publications

Publications.

A curated collection of published work in numerical analysis, fractional differential equations and geometric approximation.

33 selected papers2013–2026 · Numerical research foundations

2026

2026
Computational fluid dynamics

Numerical analysis of magnetohydrodynamic free convection hybrid nanofluid flow within a porous cavity containing multiple-heated fins using finite difference scheme

Thirumalaisamy K., Yunchang Seol, Hyunju Kim

International Journal of Numerical Methods for Heat & Fluid Flow · Ahead of print · 1–43

DOI: 10.1108/HFF-04-2026-0484
BibTeX
@article{deepmathlab-10-1108-HFF-04-2026-0484,
  title = {Numerical analysis of magnetohydrodynamic free convection hybrid nanofluid flow within a porous cavity containing multiple-heated fins using finite difference scheme},
  author = {Thirumalaisamy K. and Yunchang Seol and Hyunju Kim},
  journal = {International Journal of Numerical Methods for Heat & Fluid Flow},
  year = {2026},
  doi = {10.1108/HFF-04-2026-0484}
}
2026
Singular differential equations

Mechanics-trained neural coordinate mapping for B-spline analysis of crack-tip and corner singularities

Hyunju Kim

arXiv preprint · arXiv:2607.23229

DOI: 10.48550/arXiv.2607.23229
BibTeX
@article{deepmathlab-10-48550-arXiv-2607-23229,
  title = {Mechanics-trained neural coordinate mapping for B-spline analysis of crack-tip and corner singularities},
  author = {Hyunju Kim},
  journal = {arXiv preprint},
  year = {2026},
  doi = {10.48550/arXiv.2607.23229}
}
2026
Fractional equations

Fast and Scalable Caputo Fractional Gradient Descent via Perturbation-Preserving Memory Compression

Hwanseo Lee, Junseo Lee, Hyunju Kim

arXiv preprint · arXiv:2607.15505

DOI: 10.48550/arXiv.2607.15505
BibTeX
@article{deepmathlab-10-48550-arXiv-2607-15505,
  title = {Fast and Scalable Caputo Fractional Gradient Descent via Perturbation-Preserving Memory Compression},
  author = {Hwanseo Lee and Junseo Lee and Hyunju Kim},
  journal = {arXiv preprint},
  year = {2026},
  doi = {10.48550/arXiv.2607.15505}
}
2026
Fractional equations

A nonstandard fractional Jacobi pseudospectral method for weakly regular right-sided Caputo terminal problems

I. G. Ameen, M. Hammad, M. Razzaghi, M. A. Zaky

arXiv preprint · arXiv:2610.20829

BibTeX
@article{deepmathlab-A-nonstandard-fractional-Jacobi-pseudospectral-method-2026,
  title = {A nonstandard fractional Jacobi pseudospectral method for weakly regular right-sided Caputo terminal problems},
  author = {I. G. Ameen and M. Hammad and M. Razzaghi and M. A. Zaky},
  journal = {arXiv preprint},
  year = {2026}
}
2026
Computational fluid dynamics

Numerical Investigation of MHD-Driven Heat and Mass Transfer in a Porous Enclosure Filled With Cu–Water Nanofluid

S. I. Tanni, M. S. Ahmed, R. U. S. Zaman, F. K. Ava, I. S. Chuhan

Engineering Reports ·

BibTeX
@article{deepmathlab-Numerical-Investigation-of-MHD-Driven-Heat-2026,
  title = {Numerical Investigation of MHD-Driven Heat and Mass Transfer in a Porous Enclosure Filled With Cu–Water Nanofluid},
  author = {S. I. Tanni and M. S. Ahmed and R. U. S. Zaman and F. K. Ava and I. S. Chuhan},
  journal = {Engineering Reports},
  year = {2026}
}
2026
Fractional equations

Normalized Nabla Fractional Difference Operators with Discrete Exponential and Mittag-Leffler Kernels

C. Laouar, T. Abdeljawad, M. A. Alqudah

Fractals ·

BibTeX
@article{deepmathlab-Normalized-Nabla-Fractional-Difference-Operators-with-2026,
  title = {Normalized Nabla Fractional Difference Operators with Discrete Exponential and Mittag-Leffler Kernels},
  author = {C. Laouar and T. Abdeljawad and M. A. Alqudah},
  journal = {Fractals},
  year = {2026}
}
2026
Computational fluid dynamics

Computational analysis of shear dependent heat and mass transfer in MHD hybrid nanofluid within a porous medium

M. F. Endalew, X. J. Zhang

Discover Nano ·

BibTeX
@article{deepmathlab-Computational-analysis-of-shear-dependent-heat-2026,
  title = {Computational analysis of shear dependent heat and mass transfer in MHD hybrid nanofluid within a porous medium},
  author = {M. F. Endalew and X. J. Zhang},
  journal = {Discover Nano},
  year = {2026}
}
2026
Computational fluid dynamics

Thermogravitational convection in hybrid ferrofluids under magnetic field-dependent viscosity in a split-baffle enclosure

A. Chattopadhyay, S. Soren, S. Hansda, S. Roy

… Journal of Numerical Methods for Heat … ·

BibTeX
@article{deepmathlab-Thermogravitational-convection-in-hybrid-ferrofluids-under-2026,
  title = {Thermogravitational convection in hybrid ferrofluids under magnetic field-dependent viscosity in a split-baffle enclosure},
  author = {A. Chattopadhyay and S. Soren and S. Hansda and S. Roy},
  journal = {… Journal of Numerical Methods for Heat …},
  year = {2026}
}
2026
Computational fluid dynamics

MHD Carreau nanofluid flow with gyrotactic microorganisms, incorporating first- and second-order velocity slip

A. Dabas, A. Parmar, A. J. Chamkha, Q. Al-Mdallal

International Journal of … ·

BibTeX
@article{deepmathlab-MHD-Carreau-nanofluid-flow-with-gyrotactic-2026,
  title = {MHD Carreau nanofluid flow with gyrotactic microorganisms, incorporating first- and second-order velocity slip},
  author = {A. Dabas and A. Parmar and A. J. Chamkha and Q. Al-Mdallal},
  journal = {International Journal of …},
  year = {2026}
}
2026
Numerical methods

Stability and Error Estimates with Optimal ε-Dependence for Strang Splitting of the Allen–Cahn Equation

R. Luo, C. Quan, Z. Tan, Y. Wu

arXiv preprint · arXiv:2610.14867

BibTeX
@article{deepmathlab-Stability-and-Error-Estimates-with-Optimal-2026,
  title = {Stability and Error Estimates with Optimal ε-Dependence for Strang Splitting of the Allen–Cahn Equation},
  author = {R. Luo and C. Quan and Z. Tan and Y. Wu},
  journal = {arXiv preprint},
  year = {2026}
}

2025

2025
Computational fluid dynamics

Buoyancy-driven heat transfer and entropy analysis of a hydromagnetic GO-Fe3O4/H2O hybrid nanofluid in an energy storage enclosure partially filled with non-Darcy porous medium under an oblique magnetic field

H. Thameem Basha, Hyunju Kim, Bongsoo Jang

International Journal of Numerical Methods for Heat & Fluid Flow · 35 · 2 · 491–523

DOI: 10.1108/HFF-03-2024-0193
BibTeX
@article{deepmathlab-10-1108-HFF-03-2024-0193,
  title = {Buoyancy-driven heat transfer and entropy analysis of a hydromagnetic GO-Fe3O4/H2O hybrid nanofluid in an energy storage enclosure partially filled with non-Darcy porous medium under an oblique magnetic field},
  author = {H. Thameem Basha and Hyunju Kim and Bongsoo Jang},
  journal = {International Journal of Numerical Methods for Heat & Fluid Flow},
  year = {2025},
  doi = {10.1108/HFF-03-2024-0193}
}
2025
Geometric methods

The time-fractional Allen–Cahn equation on geometric computational domains

Dongsun Lee, Hyunju Kim

Communications in Nonlinear Science and Numerical Simulation · 141 · Article 108455

DOI: 10.1016/j.cnsns.2024.108455
BibTeX
@article{deepmathlab-10-1016-j-cnsns-2024-108455,
  title = {The time-fractional Allen–Cahn equation on geometric computational domains},
  author = {Dongsun Lee and Hyunju Kim},
  journal = {Communications in Nonlinear Science and Numerical Simulation},
  year = {2025},
  doi = {10.1016/j.cnsns.2024.108455}
}
2025
Computational fluid dynamics

Magnetohydrodynamic buoyancy-driven hybrid nanofluid flow and heat transfer within a partially heated porous square cavity

K. Thirumalaisamy, Young Duk Lee, Hyunju Kim

Physics of Fluids · 37

DOI: 10.1063/5.0264031
BibTeX
@article{deepmathlab-10-1063-5-0264031,
  title = {Magnetohydrodynamic buoyancy-driven hybrid nanofluid flow and heat transfer within a partially heated porous square cavity},
  author = {K. Thirumalaisamy and Young Duk Lee and Hyunju Kim},
  journal = {Physics of Fluids},
  year = {2025},
  doi = {10.1063/5.0264031}
}
2025
Computational fluid dynamics

Computational analysis of magnetohydrodynamic buoyancy-driven flow and thermal transmission within a circular dome-shaped porous enclosure using finite difference scheme

Hyunju Kim, K. Thirumalaisamy, Venkatadri Kothuru

International Journal of Numerical Methods for Heat & Fluid Flow · Article

BibTeX
@article{deepmathlab-Computational-analysis-of-magnetohydrodynamic-buoyancy-driven-2025,
  title = {Computational analysis of magnetohydrodynamic buoyancy-driven flow and thermal transmission within a circular dome-shaped porous enclosure using finite difference scheme},
  author = {Hyunju Kim and K. Thirumalaisamy and Venkatadri Kothuru},
  journal = {International Journal of Numerical Methods for Heat & Fluid Flow},
  year = {2025}
}
2025
Numerical methods

Robust Weight Initialization for Tanh Neural Networks with Fixed Point Analysis

Hyunwoo Lee, Hayoung Choi, Hyunju Kim

International Conference on Learning Representations (ICLR) · Conference paper

BibTeX
@inproceedings{deepmathlab-Robust-Weight-Initialization-for-Tanh-Neural-2025,
  title = {Robust Weight Initialization for Tanh Neural Networks with Fixed Point Analysis},
  author = {Hyunwoo Lee and Hayoung Choi and Hyunju Kim},
  booktitle = {International Conference on Learning Representations (ICLR)},
  year = {2025}
}

2024

2024
Computational fluid dynamics

Exploring bioconvection dynamics within an inclined porous annulus: Integration of CFD and AI on the synergistic effects of hybrid nanofluids, oxytactic microorganisms, and magnetic field

H. A. Kumara Swamy, Daesick Ryu, Hyunju Kim, M. Sankar, Younghae Do

International Communications in Heat and Mass Transfer · 159 · Article 107999

DOI: 10.1016/j.icheatmasstransfer.2024.107999
BibTeX
@article{deepmathlab-10-1016-j-icheatmasstransfer-2024-107999,
  title = {Exploring bioconvection dynamics within an inclined porous annulus: Integration of CFD and AI on the synergistic effects of hybrid nanofluids, oxytactic microorganisms, and magnetic field},
  author = {H. A. Kumara Swamy and Daesick Ryu and Hyunju Kim and M. Sankar and Younghae Do},
  journal = {International Communications in Heat and Mass Transfer},
  year = {2024},
  doi = {10.1016/j.icheatmasstransfer.2024.107999}
}
2024
Computational fluid dynamics

Computational analysis of magnetohydrodynamic ternary-hybrid nanofluid flow and heat transfer inside a porous cavity with shape effects

Hyunju Kim, Younghae Do, S. Ramachandran, M. Sankar, K. Thirumalaisamy

Physics of Fluids · 36 · 8

DOI: 10.1063/5.0222802
BibTeX
@article{deepmathlab-10-1063-5-0222802,
  title = {Computational analysis of magnetohydrodynamic ternary-hybrid nanofluid flow and heat transfer inside a porous cavity with shape effects},
  author = {Hyunju Kim and Younghae Do and S. Ramachandran and M. Sankar and K. Thirumalaisamy},
  journal = {Physics of Fluids},
  year = {2024},
  doi = {10.1063/5.0222802}
}
2024
Singular differential equations

Mapping techniques for collocation method of time-fractional convection–diffusion equations in domains with cracks

Bongsoo Jang, Hyunju Kim

Mathematics and Computers in Simulation · 217 · 60–79

DOI: 10.1016/j.matcom.2023.10.014
BibTeX
@article{deepmathlab-10-1016-j-matcom-2023-10-014,
  title = {Mapping techniques for collocation method of time-fractional convection–diffusion equations in domains with cracks},
  author = {Bongsoo Jang and Hyunju Kim},
  journal = {Mathematics and Computers in Simulation},
  year = {2024},
  doi = {10.1016/j.matcom.2023.10.014}
}
2024
Fractional equations

A Novel Numerical Method for Solving Nonlinear Fractional-Order Differential Equations and Its Applications

Seyeon Lee, Hyunju Kim, Bongsoo Jang

Fractal and Fractional · 8 · 1 · Article 65

DOI: 10.3390/fractalfract8010065
BibTeX
@article{deepmathlab-10-3390-fractalfract8010065,
  title = {A Novel Numerical Method for Solving Nonlinear Fractional-Order Differential Equations and Its Applications},
  author = {Seyeon Lee and Hyunju Kim and Bongsoo Jang},
  journal = {Fractal and Fractional},
  year = {2024},
  doi = {10.3390/fractalfract8010065}
}

2021

2021
Fractional equations

An efficient numerical approach for solving two-point fractional order nonlinear boundary value problems with Robin boundary conditions

Hyunju Kim, Junseo Lee, Bongsoo Jang

Advances in Difference Equations · 2021 · Article 193

DOI: 10.1186/s13662-021-03355-3
BibTeX
@article{deepmathlab-10-1186-s13662-021-03355-3,
  title = {An efficient numerical approach for solving two-point fractional order nonlinear boundary value problems with Robin boundary conditions},
  author = {Hyunju Kim and Junseo Lee and Bongsoo Jang},
  journal = {Advances in Difference Equations},
  year = {2021},
  doi = {10.1186/s13662-021-03355-3}
}
2021
Fractional equations

A fast and high-order numerical method for nonlinear fractional-order differential equations with non-singular kernel

Seyeon Lee, Junseo Lee, Hyunju Kim, Bongsoo Jang

Applied Numerical Mathematics · 163 · 57–76

DOI: 10.1016/j.apnum.2021.01.013
BibTeX
@article{deepmathlab-10-1016-j-apnum-2021-01-013,
  title = {A fast and high-order numerical method for nonlinear fractional-order differential equations with non-singular kernel},
  author = {Seyeon Lee and Junseo Lee and Hyunju Kim and Bongsoo Jang},
  journal = {Applied Numerical Mathematics},
  year = {2021},
  doi = {10.1016/j.apnum.2021.01.013}
}

2020

2020
Fractional equations

Shifted Jacobi spectral-Galerkin method for solving fractional order initial value problems

Hyunju Kim, Keon Ho Kim, Bongsoo Jang

Journal of Computational and Applied Mathematics · 380 · Article 112988

DOI: 10.1016/j.cam.2020.112988
BibTeX
@article{deepmathlab-10-1016-j-cam-2020-112988,
  title = {Shifted Jacobi spectral-Galerkin method for solving fractional order initial value problems},
  author = {Hyunju Kim and Keon Ho Kim and Bongsoo Jang},
  journal = {Journal of Computational and Applied Mathematics},
  year = {2020},
  doi = {10.1016/j.cam.2020.112988}
}
2020
Fractional equations

New explicit and accelerated techniques for solving fractional order differential equations

Hyunju Kim, Keon Ho Kim, Seyeon Lee, Bongsoo Jang

Applied Mathematics and Computation · 379 · Article 125228

DOI: 10.1016/j.amc.2020.125228
BibTeX
@article{deepmathlab-10-1016-j-amc-2020-125228,
  title = {New explicit and accelerated techniques for solving fractional order differential equations},
  author = {Hyunju Kim and Keon Ho Kim and Seyeon Lee and Bongsoo Jang},
  journal = {Applied Mathematics and Computation},
  year = {2020},
  doi = {10.1016/j.amc.2020.125228}
}
2020
Fractional equations

Efficient and fast predictor-corrector method for solving nonlinear fractional differential equations with non-singular kernel

Seyeon Lee, Junseo Lee, Hyunju Kim, Bongsoo Jang

arXiv preprint · arXiv:2010.02664

DOI: 10.48550/arXiv.2010.02664
BibTeX
@article{deepmathlab-10-48550-arXiv-2010-02664,
  title = {Efficient and fast predictor-corrector method for solving nonlinear fractional differential equations with non-singular kernel},
  author = {Seyeon Lee and Junseo Lee and Hyunju Kim and Bongsoo Jang},
  journal = {arXiv preprint},
  year = {2020},
  doi = {10.48550/arXiv.2010.02664}
}

2019

2019
Fractional equations

Enhanced semi-analytic method for solving nonlinear differential equations of fractional order

Bongsoo Jang, Hyunju Kim

Journal of the Korean Society for Industrial and Applied Mathematics · 23(4) · 283–300

BibTeX
@article{deepmathlab-Enhanced-semi-analytic-method-for-solving-2019,
  title = {Enhanced semi-analytic method for solving nonlinear differential equations of fractional order},
  author = {Bongsoo Jang and Hyunju Kim},
  journal = {Journal of the Korean Society for Industrial and Applied Mathematics},
  year = {2019}
}
2019
Singular differential equations

Patchwise mapping method for solving elliptic boundary value problems containing multiple singularities

Hyunju Kim

Journal of Applied Mathematics and Physics · 7 · 1572–1598

BibTeX
@article{deepmathlab-Patchwise-mapping-method-for-solving-elliptic-2019,
  title = {Patchwise mapping method for solving elliptic boundary value problems containing multiple singularities},
  author = {Hyunju Kim},
  journal = {Journal of Applied Mathematics and Physics},
  year = {2019}
}

2018

2018
Singular differential equations

Implicitly enriched Galerkin methods for numerical solutions of fourth-order partial differential equations containing singularities

Sinae Kim, Hae-Soo Oh, Birce Palta, Hyunju Kim

Numerical Methods for Partial Differential Equations · 34(6) · 2079–2112

DOI: 10.1002/num.22277
BibTeX
@article{deepmathlab-10-1002-num-22277,
  title = {Implicitly enriched Galerkin methods for numerical solutions of fourth-order partial differential equations containing singularities},
  author = {Sinae Kim and Hae-Soo Oh and Birce Palta and Hyunju Kim},
  journal = {Numerical Methods for Partial Differential Equations},
  year = {2018},
  doi = {10.1002/num.22277}
}

2016

2016
Isogeometric analysis

Partition of unity isogeometric analysis of two dimensional elliptic singular perturbation problems

Bongsoo Jang, Hyunju Kim, Hae-Soo Oh, Sinae Kim

Computational Mechanics · 58(6) · 1019–1038

BibTeX
@article{deepmathlab-Partition-of-unity-isogeometric-analysis-of-2016,
  title = {Partition of unity isogeometric analysis of two dimensional elliptic singular perturbation problems},
  author = {Bongsoo Jang and Hyunju Kim and Hae-Soo Oh and Sinae Kim},
  journal = {Computational Mechanics},
  year = {2016}
}

2014

2014
Isogeometric analysis

Enriched isogeometric analysis of elliptic boundary value problems in domains with cracks and/or corners

Hae-Soo Oh, Hyunju Kim, Jae Woo Jeong

International Journal for Numerical Methods in Engineering · 97(3) · 149–180

BibTeX
@article{deepmathlab-Enriched-isogeometric-analysis-of-elliptic-boundary-2014,
  title = {Enriched isogeometric analysis of elliptic boundary value problems in domains with cracks and/or corners},
  author = {Hae-Soo Oh and Hyunju Kim and Jae Woo Jeong},
  journal = {International Journal for Numerical Methods in Engineering},
  year = {2014}
}

2013

2013
Isogeometric analysis

Mapping techniques for isogeometric analysis of elliptic boundary value problems containing singularities

Jae Woo Jeong, Hae-Soo Oh, Sunbu Kang, Hyunju Kim

Computer Methods in Applied Mechanics and Engineering · 254 · 334–352

DOI: 10.1016/j.cma.2012.09.009
BibTeX
@article{deepmathlab-10-1016-j-cma-2012-09-009,
  title = {Mapping techniques for isogeometric analysis of elliptic boundary value problems containing singularities},
  author = {Jae Woo Jeong and Hae-Soo Oh and Sunbu Kang and Hyunju Kim},
  journal = {Computer Methods in Applied Mechanics and Engineering},
  year = {2013},
  doi = {10.1016/j.cma.2012.09.009}
}
2013
Isogeometric analysis

Isogeometric analysis and patchwise reproducing polynomial particle method for plates

Hyunju Kim

The University of North Carolina at Charlotte · Dissertation

BibTeX
@phdthesis{deepmathlab-Isogeometric-analysis-and-patchwise-reproducing-polynomial-2013,
  title = {Isogeometric analysis and patchwise reproducing polynomial particle method for plates},
  author = {Hyunju Kim},
  school = {The University of North Carolina at Charlotte},
  year = {2013}
}
2013
Isogeometric analysis

Patchwise Reproducing Polynomial Particle Method for Thick Plates: bending, free vibration, and buckling

Hyunju Kim, Bongsoo Jang

Journal of the Korean Society for Industrial and Applied Mathematics · 17(2) · 67–85

BibTeX
@article{deepmathlab-Patchwise-Reproducing-Polynomial-Particle-Method-for-2013,
  title = {Patchwise Reproducing Polynomial Particle Method for Thick Plates: bending, free vibration, and buckling},
  author = {Hyunju Kim and Bongsoo Jang},
  journal = {Journal of the Korean Society for Industrial and Applied Mathematics},
  year = {2013}
}