[ 18 ]   Y. Ichida, Traveling waves for a Fisher-KPP equation with power nonlinear degenerate diffusion, J . Elliptic Parabol. Equ, 11 (2025), no. 2, pp. 1725--1746.

 　　      [ Jounal ]　　（Doi: 10.1007/s41808-025-00392-x） ※ Corresponding author

[ 17 ]    Y. Ichida, R. Yamada, S. Kato, Y. Kamaya, M. Kosuge, M. Aizawa, T.O. Sakamoto, S. Yazaki, A simple mathematical model for evaluation of non-fragmentation property of injectable calcium-phosphate cement, Sci Rep 15 (2025), 21571.

                [ Jounal ]　　（Doi: 10.1038/s41598-025-06039-0）[ Source code へのアクセスはこちら ]    ※ Corresponding author

[ 16 ]    Y. Ichida, Classification of weak and unbounded traveling wave solutions for a Porous-Fisher-KPP equation, SN Partial differ. Equ. Appl. 6 (2025), No. 3, Paper No. 25,  24 pp.

                [ Jounal ]　　（Doi: 10.1007/s42985-025-00335-0）   ※ Corresponding author

[ 15 ]    Y. Ichida, S. Motonaga,  Geometric structure of the traveling waves for 1D degenerate parabolic equation, J. Dyn.Differ.Equations  37 (2025), no. 4, 2931--2949.

                 [ Jounal ]　　（Doi: 10.1007/s10884-024-10389-0）   ※ Corresponding author

[ 14 ]    Y. Ichida, Y. Nakata,  Global dynamics of a simple model for wild and sterile mosquitoes, Math.  Biosci. Eng., 21 (2024), issue 9, pp.7016--7039.

               [ Jounal ]　　（Doi: 10.3934/mbe.2024308）   ※ Corresponding author

[ 13 ]    Y. Ichida, T.O. Sakamoto,  Classification of nonnegative traveling wave solutions for certain 1D degenerate parabolic equation and porous medium type equation, Discrete Contin. Dyn. Syst., 44 (2024), no. 8, pp. 2342 -- 2367. 

                [ Jounal ]　　（Doi: 10.3934/dcds.2024030）  available on arXiv: 2304.00802    [ arXiv ]     ※ Corresponding author

[ 12 ]    Y. Ichida, A characterization of nonnegative stationary solutions for certain 1D degenerate parabolic equations and their applications, Commun. Pure Appl. Anal. 23 (2024), no. 6, pp. 873--894.

　      　[ Journal ] 　（Doi: 10.3934/cpaa.2024038）※ Corresponding author

[ 11 ]   Y. Ichida, T.O. Sakamoto, Geometric approach to the bifurcation at infinity: A case study,  Qual. Theory Dyn. Syst. 23 (2024), no. 3, Paper No. 109, 24 pp.

　      　[ Journal ] 　（Doi: 10.1007/s12346-024-00966-5）※ Corresponding author

[ 10 ]    Y. Ichida, Radially symmetric stationary solutions for certain chemotaxis systems in higher dimensions: a geometric approach, Discrete Contin. Dyn. Syst., 43 (2023), no. 5, pp. 1975--2001. 

                [ Journal ]         (Doi: 10.3934/dcds.2022188)   ※ Corresponding author

[ 9 ]    Y. Ichida, Classification of nonnegative traveling wave solutions for the 1D degenerate parabolic equations, Discrete Contin. Dyn. Syst., Ser. B, 28 (2023), no. 2, pp. 1116--1132.

                [ Journal ]         (Doi: 10.3934/dcdsb.2022114)    ※ Corresponding author

[ 8 ]    Y. Ichida, Traveling waves with singularities in a damped hyperbolic MEMS type equation in the presence of negative powers nonlinearity, Electron. J. Differ. Equ, 2023 (2023), no. 5, 1--20.

               [ Journal ]       ※ Corresponding author

[ 7 ]    Y. Ichida, T.O. Sakamoto, Radially symmetric stationary solutions for a MEMS type reaction-diffusion equation with fringing field, Nonlinearity, 36 (2023), no. 1, pp. 71--109.

                [ Journal ]         (Doi: 10.1088/1361-6544/ac9bc3)

[ 6 ]     Y. Ichida, T.O. Sakamoto, Stationary solutions for a 1D pde problem with gradient term and negative powers nonlinearity, J . Elliptic Parabol. Equ, 8 (2022), no. 2, pp. 885--918.

                 [ Journal ]    （Doi : 10.1007/s41808-022-00180-x)    ※ Corresponding author

[ 5 ]    Y. Ichida, On global behavior of a some SIR epidemic model based on the Poincar\'e compactification,  JSIAM Lett. 14 (2022), pp. 65--68.

                Open access :   [ Journal ]        (Doi: 10.14495/jsiaml.14.65)        available on arXiv: 2201.05321  [ arXiv ]     ※ Corresponding author

[ 4 ]    Y. Ichida, T.O. Sakamoto, Radial symmetric stationary solutions for a MEMS type reaction-diffusion equation with spatially dependent nonlinearity, Jpn. J. Ind. Appl. Math. 38 (2021), no.1, pp. 297--322.

                [ Journal ]        (Doi: 10.1007/s13160-020-00438-8)

[ 3 ]    Y. Ichida, K. Matsue, T.O. Sakamoto, A refined asymptotic behavior of traveling wave solutions for degenerate nonlinear parabolic equations,  JSIAM Lett. 12 (2020), pp. 65--68

               Open access :  [ Journal ]        (Doi: 10.14495/jsiaml.12.65)        available on arXiv: 2008.00174   [arXiv]     ※ Corresponding author

[ 2 ]    Y. Ichida, T.O. Sakamoto, Traveling wave solutions for degenerate nonlinear parabolic equations, , J. Elliptic Parabol. Equ. 6 (2020), no.2, pp. 795--832.

              [ Journal ]    （Doi : 10.1007/s41808-020-00080-y）    [ Correction ] 

[ 1 ]    Y. Ichida, T. O.  Sakamoto, Quasi traveling waves with quenching in a reaction-diffusion equation in the presence of negative powers nonlinearity. Proc. Japan Acad. Ser.A Math Sci. 96 (2020), no.1, pp. 1--6. 

Open access  :  [ Journal ]   （Doi : 10.3792/pjaa.96.001）

[ 3 ]   J.-S. Guo, Y. Ichida, C.-C. Wu, S. Yotsutani, Bifurcation diagram for boundary value problem arising in the polarized ionic conductor, submitted.

[ 2 ]    Y. Ichida, Geometric structure of stationary problem for spatial 1D self-diffusion equation with logistic growth, submitted.    available on arXiv: 2509.24752  [ arXiv ]

[ 1 ]    Y. Ichida, Traveling waves in the spatial 1D Fisher-KPP equation with Allee effect, submitted.

Y. Ichida, H. Izuhara, Traveling waves of 1D positive/negative chemotaxis system with logistic term: a geometric approach, in preparation.

Y. Ichida, H. Izuhara, Classification of non-negative and sign-changing traveling waves for spatial 1D self-diffusion equation with logistic growth, in preparation.

Y. Ichida, D. Yamane, xxx, in preparation.

Y. Ichida, D. Yamane, xxx, in preparation.

[ 4 ]    市田 優，微分方程式の無限遠ダイナミクスといくつかの応用，数学と現象 in 宮崎，2024, 11p.   [ HPへ ] 

[ 3 ]    市田 優，坂元 孝志，MEMS型反応拡散方程式へのポアンカレ型コンパクト化の応用（偏微分方程式の幾何学的様相），京都大学数理解析研究所講究録（RIMS Kokyuroku） No. 2251 (2023.5),  63--73.     [ HPへ ] 

[ 2 ]    市田 優，無限遠ダイナミクスが導くある走化性方程式系の球対称定常解，第43回発展方程式若手セミナー報告集 (2022)，33--40.

[ 1 ]    市田 優，相空間のコンパクト化に基づく空間1次元退化放物型方程式における非負の進行波解の分類，第18回 数学総合若手研究集会：数学の交叉点，Hokkaido University Technical Report Series in Mathematics（北海道大学数学講究録）182 (2022), 737--745.      [ HPへ ] 

[ 2 ]   市田 優，数学の防災，防災の数学，『理』（コトワリ），76号（2025年10月），関西学院大学出版会，4--5.

[ 1 ]   市田 優，数式たちは防災している!? 数理モデリング，力学系理論の観点からの防災数学 ，数学セミナー，749号（2024年3月号），日本評論社，15 -- 17.

[ 1 ]  2024/10/4公開「月と窓」関西学院大学ウェブ広報誌，"いつかは自然災害の予測も．身の回りに潜む"災い"を数理モデルで予測・制御する「防災数学」への期待"：[ 月と窓のHP ]