山川雄也(Yuya Yamakawa)
京都大学 大学院情報学研究科
数理工学専攻 最適化数理分野 助教
住所 : 〒606-8501 京都府京都市左京区吉田本町
居室 : 吉田キャンパス 総合研究8号館205号室
Email : yuya (at) i.kyoto-u.ac.jp
【研究キーワード】
- 非線形計画問題
- 非線形方程式
- 半正定値計画問題
- 非線形半正定値計画問題
- リーマン多様体上の最適化問題
- 最適制御問題
- 偏微分方程式制約付き最適化問題
- 関数空間上の最適化問題
- 内点法
- 逐次二次計画法
- 拡張ラグランジュ法
- レベンバーグ・マルカート法
【所属学会】
- 日本オペレーションズ・リサーチ学会
- 日本応用数理学会
【研究成果】
・査読付き論文
[10] S. Ariizumi, Y. Yamakawa, and N. Yamashita, "Convergence properties of Levenberg-Marquardt methods with generalized regularization terms", Applied Mathematics and Computation, Vol. 463, p. 128365, (2024).
[9] Y. Yamakawa, T. Ikegami, E. H. Fukuda, and N. Yamashita, "An equivalent nonlinear optimization model with triangular low-rank factorization for semidefinite programs", Optimization Methods and Software, Vol. 38, No. 6, pp. 1296-1310, (2023).
[8] Y. Yamakawa, "A stabilized sequential quadratic programming method for optimization problems in function spaces", Numerical Functional Analysis and Optimization, Vol. 44, No. 9, pp. 867-905, (2023).
[7] K. Okabe, Y. Yamakawa, and E. H. Fukuda, "A revised sequential quadratic semidefinite programming method for nonlinear semidefinite optimization", Journal of Industrial and Management Optimization, Vol. 19, No. 10, pp. 7777-7794, (2023).
[6] A. Hori, Y. Yamakawa, and N. Yamashita, "Distributionally Robust Expected Residual Minimization for Stochastic Variational Inequality Problems", Optimization Methods and Software, Vol. 38, No. 4, pp. 756-780, (2023).
[5] Y. Yamakawa and T. Okuno, "A stabilized sequential quadratic semidefinite programming method for nonlinear semidefinite programming problems", Computational Optimization and Applications, Vol. 83, No. 3, pp. 1027-1064, (2022).
[4] Y. Yamakawa and H. Sato, "Sequential optimality conditions for nonlinear optimization on Riemannian manifolds and a globally convergent augmented Lagrangian method", Computational Optimization and Applications, Vol. 81, No. 2, pp. 397-421, (2022).
[3] Y. Yamakawa and N. Yamashita, "A block coordinate descent method for a maximum likelihood estimation problems of mixture distributions", Pacific Journal of Optimization, Vol. 11, No. 4, pp. 669-686, (2015).
[2] Y. Yamakawa and N. Yamashita, "A differentiable merit function for shifted perturbed Karush-Kuhn-Tucker conditions of the nonlinear semidefinite programming", Pacific Journal of Optimization, Vol. 11, No. 3, pp. 557-579, (2015).
[1] Y. Yamakawa and N. Yamashita, "A two-step primal-dual interior point method for nonlinear semidefinite programming problems and its superlinear convergence", Journal of the Operations Research Society of Japan, Vol. 57, No. 3-4, pp. 105-127, (2014).
・査読なし論文等
[3] H. Matsui and Y. Yamakawa, "Sparse estimation in ordinary kriging for functional data", arXiv preprint, https://arxiv.org/abs/2306.15537.
[2] Y. Yamakawa, H. Sato, and K. Aihara, "Modified Armijo line-search in Riemannian optimization with reduced computational cost", arXiv preprint, https://arxiv.org/abs/2304.02197.
[1] Y. Yamakawa, "Superlinear and quadratic convergence of a stabilized sequential quadratic semidefinite programming method for nonlinear semidefinite programming problems", arXiv preprint, https://arxiv.org/abs/2210.17169.
・特許
[1] 山川雄也,落合勝博,“降雨量予測装置,降雨量予測方法,および記録媒体”,特許第6874770号,2021年4月26日.
[2] 山川雄也,落合勝博,“シミュレーション装置,シミュレーション方法及びプログラム”,特許第6819692号,2021年1月6日.
[3] 山川雄也,“センサ設置支援装置,データ処理装置,センサ設置支援方法及びプログラム”,特許第6701839号,2020年5月11日.