Talks of Kazuamsa Fujiwara
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Talks in international conferences
  1. Kazumasa Fujiwara and Vladimir Georgiev, "Lifespan estimate for classical damped wave equations with some initial data", ICIAM 2023, Waseda University, 25th August 2023, [abstract].
  2. Kazumasa Fujiwara and Vladimir Georgiev, "A lifespan estimate for semilinear classical damped wave equations", Geometric Analysis in Harmonic Analysis and PDE, 27th March 2023.
  3. Kazumasa Fujiwara and Vladimir Georgiev, "Remark on the lifespan of semilinear classical damped wave equation", Analysis Seminar Pisa University, 18th January 2023.
  4. Kazumasa Fujiwara and Vladimir Georgiev, "Necessary and sufficient condition of L^2 global existence for a periodic nonlinear Schrödinger equation", Webinar Critical exponent versus blow-up in evolution models, 8th December 2020.
  5. Kazumasa Fujiwara, "Non existence of time-local solutions to semilinear semirelativistic equation in some subcritical case", Dispersive and subelliptic PDEs, Scuola Nomale Superiore, February 2020.
  6. Luigi Forcella, Kazumasa Fujiwara, Vladimir Georgiev, and Tohru Ozawa, "Remark on blow-up for the half Ginzburg-Landau-Kuramoto eq. with rough coefficients", 12th ISAAC Congress, Universidade de Aveiro, July-August 2019, [abstract].
  7. Luigi Forcella, Kazumasa Fujiwara, Vladimir Georgiev, and Tohru Ozawa, "An estimate for commutator of fractional Laplacian with rough metric", International Workshop on "Fundamental Problems in Mathematical and Theoretical Physics", Waseda University, July 2019, [abstract].
  8. Luigi Forcella, Kazumasa Fujiwara, Vladimir Georgiev, and Tohru Ozawa, "A commutator estimate of fractional Laplacian with rough coefficients and its application", RIMS Workshop: Harmonic Analysis and Nonlinear Partial Differential Equations, Kyoto University, July 2019, [program].
  9. Luigi Forcella, Kazumasa Fujiwara, Vladimir Georgiev, and T. Ozawa, "Local well-posedness and blow-up for the half Ginzburg-Landau-Kuramoto equation with rough coefficients and metric", The 45th Conference Applications of Mathematics in Engineering and Economics, Sozopol, June 2019, [program].
  10. K. Fujiwara, V. Georgiev, T. Ozawa, "On self-similar solutions to the derivative nonlinear Schrődinger equation", PDE Workshop Waseda - GSSI, L'Aquila-Pisa, Università di Pisa, February, 2019, [poster].
  11. L. Forcella, K. Fujiwara, V. Georgiev, and T. Ozawa, "A commutator estimate for fractional Laplacians with rough metrics", Fifth International Conference, New Trends in the Applications of Differential Equations in Sciences, Институт по механика, Българска академия на науките (Institute of Mechanics, Bulgarian Academy of Science), June 2018.
  12. K. Fujiwara, M. Ikeda, and Y. Wakasugi, "A remark on blowup for weakly coupled heat systems by an ODE approach", EDP e DINTORNI, Universityà di Bari, December 2017.
  13. K. Fujiwara, V. Georgiev, and T. Ozawa, "Higher order fractional Leibniz estimates", ISAAC Congress 2017, Linnæus University, August 2017.
  14. K. Fujiwara and T. Ozawa, "Lifespan of strong solutions to the periodic derivative nonlinear Schrödinger equation", International Workshop on “Fundamental Problems in Mathematical and Theoretical Physics”, Waseda University, August 2017.
  15. K. Fujiwara and T. Ozawa, "Lifespan of strong solutions to the periodic nonlinear Schrödinger equation without gauge invariance", 11th AIMS Conference Series on Dynamical Systems and Differential Equations, Orlando Regency hyatt, July 2016.
  16. K. Fujiwara, "Nonexistence of local solutions for the Cauchy problem of semirelativistic equations", Workshop on Analysis in Kagurazaka 2016, Tokyo University of Science, January 2016.
  17. K. Fujiwara, "Remark on local solvability of the Cauchy problem for semirelativistic equations", International Workshop on “Fundamental Problems in Mathematical and Theoretical Physics”, Waseda University, October 2015.
  18. K. Fujiwara, S. Machihara, and T. Ozawa, "The well-posedness of the Cauchy problem for a semirelativistic system", 10th AIMS Conference Series on Dynamical Systems and Differential Equations, Instituto de Ciencias Matematicas (ICMAT), the Universidad Autonoma de Madrid (UAM)), July 2014.
  19. K. Fujiwara and T. Ozawa, "Weighted Lp-boundedness of convolution type integral operators associated with bilinear estimates in the Sobolev space", RIMS Workshop: Harmonic Analysis and Nonlinear Partial Differential Equations, Kyoto University, July 2014.
  20. K. Fujiwara, S. Machihara, T. Ozawa, "Well-posedness for the Cauchy problem of a system of semirelativistic equations", One Forum, Two Cities 2013: Aspect of Nonlinear PDEs, Waseda University, September 2013.
Poster sessions in international conferences
  1. K. Fujiwara, V. Georgiev, and T. Ozawa, "Higher order fractional Leibniz rule", Mathematical Analysis for Stability in Nonlinear Dynamics ‐in honor of Professor V. Georgiev on his 60th birthday‐, Hokkaido University, August 2016.
Talks in Japanese conferences
  1. Kazumasa Fujiwara・Vladimir Georgiev, "On the decay rate of solutions to semilinear damped wave equation with slowly decreasing initial data", Superstruct of a qualitative theory ofo ODEs and exploration of its versatility, RIMS, 23th October 2024.
  2. Kazumasa Fujiwara and V. Georgiev, "Lifespan estimate and asymptotic behavior for 1D semilinear damped wave equations with some initial data", 東北大学応用数理解析セミナー, Tohoku University, 20th June 2024.
  3. Kazumasa Fujiwara and V. Georgiev, "Lifespan estimate for classical damped wave equations with some initial data", Kyoto University NLPDE Seminar, online, 19th January 2024.
  4. Kazumasa Fujiwara and V. Georgiev, "Lifespan estimate for classical damped wave equations with some initial data", Tottori PDE Seminar 2023, 鳥取県立生涯学習センター, Tottori, 23th November 2023.
  5. Kazumasa Fujiwara and V. Georgiev, "A lifespan estimate for semilinear classical damped wave equations", 京都駅前セミナー, Ryukoku University, 19th April 2023.
  6. Kazumasa Fujiwara and Vladimir Georgiev, "Necessary and sufficient condition for global existence of $L^2$ solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity", 微分方程式の総合的研究, online, 25th December 2022.
  7. K. Fujiwara・V. Georgiev, A lifespan estimate for classical damped wave equations with some initial data, Nagoya Differintial Equations Seminar, Nagoya University, 17th October 2022.
  8. K. Fujiwara and V. Georgiev, A lifespan estimate of solutions to semilinear damped wave equation under some initial condition, 第3回大同大学若手セミナー, Daido University, 22nd August 2022 (22nd August -- 23rd August).
  9. K. Fujiwara and V. Georgiev, A lifespan estimate of solutions to semilinear damped wave equation under some initial condition, Colloquium in Grad. Sch. of Math., Nagoya Univ., Nagoya University(online talk), 20th July 2022, [abstract].
  10. Kazumasa Fujiwara, On a test function method with fractional derivatives, 第5回 反応拡散方程式と非線形分散型方程式の解の挙動, Kumamoto University(online talk), 18th February 2022(17th February -- 18th February).
  11. Kazumasa Fujiwara, Remark on chain rules in the Sobolev framework, Nonlinear wave equations, Waseda University, 21th December 2021.
  12. Kazumasa Fujiwara and Vladimir Georgiev, Necessary and sufficient condition for global existence of L2 solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity, The 46th Sapporo Symposium on Partial Differential Equations, Hokkadio University(online talk), 12th August 2021.
  13. Kazumasa Fujiwara and Vladimir Georgiev, "Necessary and sufficient condition for global existence of $L^2$ solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity", Nagoya Differintial Equations Seminar, Nagoya University, 12th April 2021.
  14. Kazumasa Fujiwara and Vladimir Georgiev, "Necessary and sufficient condition for global existence of $L^2$ solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity", 第10回室蘭非線形解析研究会, online, 8th January 2021.
  15. Kazumasa Fujiwara and Vladimir Georgiev, "Necessary and sufficient condition for global existence of $L^2$ solutions for 1D periodic NLS with non-gauge invariant quadratic nonlinearity", Kyoto University NLPDE Seminar, online, 11th December 2020.
  16. K. Fujiwara and V. Georgiev, "A sufficient and necessary condition for blow-up of non-gauge invariant nonlinear periodic Schrödinger equations", 721th 応用解析研究会, Waseda University, 24th October 2020.
  17. K. Fujiwara, M. Ikeda, and Y. Wakasugi, "An ODE approach for the blow-up for nonlinear damped wave equations with time dependent damping", なかもず解析セミナー, Osaka Prefecture University, September 2017.
  18. K. Fujiwara and T. Ozawa, "トーラス上の微分型シュレディンガー方程式の爆発現象に就いて (On the blow-up phenomena for derivative type nonlinear Schrödinger euqations on torus)", 平成29年度育志賞研究発表会, Osaka University, September 2017.
  19. K. Fujiwara, T.Ozawa, M. Ikeda, and Y. Wakasugi, "An ODE approach for blow-up of some evolution equations in Fujita subcritical case", 大阪駅前セミナー, Ryukoku University, July 2017.
    (This talk is based on joint works with Prof. T. Ozawa and with M. Ikeda and Y. Wakasugi.)
  20. K. Fujiwara, V. Georigev, and T. Ozawa, "Blow-up for self-interacting fractional Ginzburg-Landau equation and related commutator estimates", 熊本大学応用解析セミナー, Kumamoto University, April 2017.
  21. K. Fujiwara, V. Georigev, and T. Ozawa, "Blow-up for self-interacting fractional Ginzburg-Landau equation", 第1回中央大学偏微分方程式セミナー, Chuo University, April 2017.
  22. K. Fujiwara, V. Georigev, and T. Ozawa, "Blow-up for self-interacting fractional Ginzburg-Landau equation", 第 24 回応用解析研究会シンポジウム, Hakone, March 2017.
  23. K. Fujiwara, "半相対論的方程式の劣臨界尺度に於ける可解性(Solvability of semirelativistic equations in a scaling subcritical case)", 第 23 回応用解析研究会シンポジウム,/ Yugawara, February 2016.
  24. K. Fujiwara, "Nonexistence of local solutions for the Cauchy problem of semirelativistic equations", The 22nd Machikaneyama Seminar on PDEs , Osaka University, February 2016.
  25. K. Fujiwara, "半相対論的方程式の局所可解性について(On the solvability of semirelativistic equation)", 第 41 回発展方程式研究会, Japan Women's University, December 2015.
  26. K. Fujiwara, "半相対論的方程式の時間局所可解性に就いて(On the solvability of semirelativistic equation)"", MSJ Autumn meeting 2015, Kyoto Sangyo University, 2015 年 9 月.
  27. K. Fujiwara and T. Ozawa, "On the global solvability to the Cauchy problem for semirelativistic equations with power type nonlinearity", 第 22 回応用解析研究会シンポジウム, Atami, March 2015.
  28. K. Fujiwara and T. Ozawa, "On the nonexistence of global solutions to the Cauchy problem for semirelativistic equations with power type nonlinearity", 名古屋微分方程式セミナー, Nagoya University, January 2015.
  29. K. Fujiwara and T. Ozawa. "A remark on global solutions to Semirelativistic equations with power type nonlinearity", 数理物理に現れる偏微分方程式研究会, Izu, January 2015.
  30. K. Fujiwara, S. Machihara, and T. Ozawa, "半相対論的方程式系に於ける初期値問題の適切性(On the well-posedness of semirelativistic system)", 三大学偏微分方程式セミナー , Chuo University, April 2014.
  31. K. Fujiwara, S. Machihara, and T. Ozawa, "半相対論的方程式系の時間大域可解性 (On the global well-posedness of semirelativistic system)", MSJ Spring Meeting 2014, Gakushuin, March 2014.
  32. K. Fujiwara, S. Machihara, and T. Ozawa, "半相対論的方程式系に於ける可解性 (On the solvability of semirelativistic system)", 第21回応用解析研究会シンポジウム, Hakone, March 2014.
  33. K. Fujiwara, S. Machihara, and T. Ozawa, "半相対論的連立方程式系の初期値問題に対する時間大域可解性 (On the global well-posedness of semirelativistic system)", 若手のための偏微分方程式と数学解析, Kyusyu University, March 2014.
  34. K. Fujiwara, S. Machihara, and T. Ozawa, ""二次の非線形項を伴う半相対論方程式系に於ける初期値問題の適切性 (The well-posedness of the sermirelativistic equations with a quadratic nonlinearity)", MSJ Autumn Meeting 2013, Ehime University, September 2013.
  35. K. Fujiwara, S. Machihara, and T. Ozawa, "二次の非線形項を伴う半相対論方程式系に於ける初期値問題の適切性 (The well-posedness of the sermirelativistic equations with a quadratic nonlinearity)", 第 35 回発展方程式若手セミナー, Yamagata, August 2013.