Presentation lists (International)
 Tomoyuki Obuchi, Ayaka Sakata
2019 Workshop on Statistical Physics of Disordered Systems and Its Applications (SPDSA2019) (Akiu Resort Hotel Sakan, Sendai, 2019/10/2728)
"Cross validation in sparse linear regression with piecewise continuous
nonconvex penalties and its acceleration" (Oral, Invited)
 Tomoyuki Obuchi, Ayaka Sakata
Statistical Physics and Neural Computation (SPNC2019) (Sun Yatsen University, Guangzhou, 2019/10/46)
"Cross validation in sparse linear regression with piecewise continuous nonconvex penalties and its acceleration" (Oral)
 Tomoyuki Obuchi
2019 International Workshop on Glass Physics in Beijing (Institute of Theoretical Physics  Chinese Academy of Sciences (ITPCAS), Beijing, 2019/9/2528)
"Statistical mechanical analysis of sparse linear regression as a variable selection problem" (Oral, Invited)
 Tomoyuki Obuchi, Ayaka Sakata
The 4th ISMZIBIMI MODAL Workshop on Mathematical Optimization and Data Analysis (The Institute of Statistical Mathematics, Tokyo, 2019/3/2530)
"Crossvalidation in sparse linear regression with piecewise continuous nonconvex penalties and its acceleration"
(Oral)
 Tatsuro Kawamoto, Masashi Tsubaki, Tomoyuki Obuchi
NeurIPS2018 (Palais des Congrès de Montréal, Montréal, CANADA, 2018/12/28)
"Meanfield theory of graph neural networks in graph partitioning"
(Poster)

Yu Terada, Tomoyuki Obuchi, Takuya Isomura, Yoshiyuki Kabashima
NeurIPS2018 (Palais des Congrès de Montréal, Montréal, CANADA, 2018/12/28)
"Objective and efficient inference for couplings in neuronal networks"
(Poster)
 Tomoyuki Obuchi, Y. NakanishiOhno, M. Okada and Y. Kabashima
Disordered serendipity: a glassy path to discovery (Rome, Italy, 2018/09/1922)
"Statistical mechanical analysis of sparse linear regression as a variable selection problem"
(Poster)
 Tomoyuki Obuchi and Y. Kabashima
MACHINE LEARNING AND PHYSICS BACK TOGETHER (Cargese, France, 2018/08/2009/01)
"Accelerating CrossValidation in Multinomial Logistic Regression with L1Regularization"
(Poster)
 Tomoyuki Obuchi, Y. NakanishiOhno, M. Okada and Y. Kabashima
International Meeting on "HighDimensional Data Driven Science" (HD32017) (Mielparque Kyoto, Kyoto, 2017/9/1013)
"Statistical
mechanical analysis of sparse linear
regression as a variable selection problem"
(Poster)
 Tomoyuki Obuchi
AQC2017 (GranTokyo South Tower, Tokyo, 2017/6/2629)
"Complex semiclassical analysis of the Loschmidt amplitude and dynamical quantum phase transitions" (Poster)
 Tomoyuki Obuchi
Workshop on Statistical physics, Learning, Inference and Networks (L'Ecole de Physique des Houches, France, 2017/2/263/3)
"Cross validation in sparse linear regression penalized by L_1 regularization variants" (Poster)
 Tomoyuki Obuchi
Entanglement and nonequilibrium physics of pure and disordered systems (ICTP, Trieste, Italy, 2016/7/2527)
"Dynamical singularity of fidelity in quantum quench: Towards its experimental observation" (Poster)
 Tomoyuki Obuchi
Statphys26 (Centre de Congrès de Lyon, Lyon, France, 2016/7/1822)
"Statistical mechanics for variable selection in linear regression: Fast and reliable cross validation" (Poster)
 Tomoyuki Obuchi
Statistical physics methods in biology and computer science (Ecole Normale Superieure, Paris, France, 2016/7/1116)
"Cross validation in LASSO and its acceralation" (Oral)
 Tomoyuki Obuchi, Remi Monasson, and Simona Cocco
APS march meeting (Baltimore Convention Center, Baltimore, USA, 2016/3/1418)
"Learning probabilities from random observables in high dimensions: the maximum entropy distribution and others" (Oral)
 Tomoyuki Obuchi
Physics Informed Machine Learning (Inn at Loretto, 211 Old Santa Fe Trail, Santa Fe, USA, 2016/1/1922))
"Theoretical performance analysis of sparse approximation problem" (Poster)
 Tomoyuki Obuchi
International Meeting on "HighDimensional Data Driven Science" (HD32015) (Mielparque Kyoto, Kyoto, 2015/12/1417)
"Sparse approximation problem: how rapid simulated annealing succeeds and fails" (Oral)
 Tomoyuki Obuchi
New Horizons of Quantum and Classical Information 2015 (NHQCI2015) (Tokyo Tech, Tokyo, 2015/8/35))
"Dimensionality Reduction Based on an Overcomplete Basis" (Oral, invited)
 Tomoyuki Obuchi, Remi Monasson, and Simona Cocco
StatphysKolkata VIII (S.N.Bose Laboratory, Kolkata, 2014/11/3012/6)
"Properties of Probability Distributions Constrained by Observables: Implication to Maximum Entropy Modeling" (Invited, Oral)
 Tomoyuki Obuchi, Remi Monasson, and Simona Cocco
Collective Dynamics in Information Systems (KITPC, Beijing, 2014/10/831)
"Properties of Probability Distributions Constrained by Observables: Implication to Maximum Entropy Modeling" (Oral)
 Tomoyuki Obuchi and Hikaru Kawamura
Spin glasses: An old tool for new problems (Institute D'Etudes Scientifiques de Cargese, Cargese, France, 2014/8/259/6)
"Monte Carlo simulations of the threedimensional XY spin glass focusing on chiral and spin order" (Poster)
 Tomoyuki Obuchi, Remi Monasson, and Simona Cocco
SPDSA2014Inverse problem and statistical machine learning (Kyoto University, Kyoto, 2014/3/10)
"Properties of Probability Distributions Constrained by Observables: Implication to Maximum Entropy Modeling" (Invited, Oral)  Kazutaka Takahashi and Tomoyuki Obuchi
ICSG2013
(Hokkaido University, Sapporo, Japan, 2013/7/2830)
"Zeros of the partition function and dynamical singularities in spinglass systems" (Oral)

Tomoyuki Obuchi, Remi Monasson and Simona Cocco
ICSG2013
(Hokkaido University, Sapporo, Japan, 2013/7/2830)
"Inverse Problem based on Randomized Moment Matching and Maximum Entropy Principle" (Poster)
 Tomoyuki Obuchi
Statistical Physics of Disordered Systems and Its Applications (SPDSA2013)
and Prologue Series V of FSPIP2013 (Hotel Sakan, Sendai, Japan, 2013/3/2021)
"PartitionFunction Zeros of Spin Glasses and Singularities in Quantum Quench Dynamics"（Invited, Oral)
 Tomoyuki Obuchi and Hikaru Kawamura
Statphys 25
(Seoul National University, Seoul, 2013/7/2226)
"Monte Carlo simulations of the threedimensional XY spin glass focusing on chiral and spin order" (Poster, PP2812)

Tomoyuki Obuchi and Hikaru Kawamura
Novel Phenomena in Frustrated Systems
(La Fonda Hotel, Santa Fe, New Mexico, USA, 2011/5/2327)
"Spin and chiral orderings of the antiferromagnetic XY model on a triangular lattice and their
critical properties" (Poster)

Tomoyuki Obuchi and Hikaru Kawamura
CIFAR/MEXT Japanese Network
(Coast Plaza Hotel and Suites, Vancouver, Canada, 2011/5/2831)
"Spin and chiral orderings of the antiferromagnetic XY model on a triangular lattice and their
critical properties" (Poster)
 Tomoyuki Obuchi and Hikaru Kawamura
International Conference on Frustration in Condensed Matter (ICFCM)
(the Sendai International Center, Sendai, Japan, 2011/1/1114)
"Spin and chiral orderings of the antiferromagnetic XY model on a triangular lattice and their
critical properties" (Poster, P94)
 Tomoyuki Obuchi, Yoshiyuki Kabashima, and Hidetoshi Nishimori
Statphys24
(the Convention Centre, Cairns, Queensland, Australia, 2010/7/1923)
"Complex replica zeros of +/J Ising spin glass at zero temperature" (Poster, Topic 9)
 Tomoyuki Obuchi and Yoshiyuki Kabashima
International Meeting on ''Inference, Computation, and Spin Glasses'' (ICSG2010)
(Campus Plaza Kyoto, Kyoto 2010/3/1618)
"Weight space structure and analysis using a finite replica number in the Ising perceptron" (Invited, Oral)
 Tomoyuki Obuchi, Yoshiyuki Kabashima, Hidetoshi Nishimori, and Masayuki Ohzeki
International Symposium on Nanoscience and Quantum Physics nanoPHYS'09
(Tokyo, Japan 2009/2/2325)
"ZeroTemperature Complex Replica Zeros of ±J Ising Spin Glass on Meanfiled systems and Beyond" (Poster)
 Tomoyuki Obuchi and Hidetoshi Nishimori
Statphys 23
(Genova, Italy 2007/7/913)
"Phase diagram of the pspininteracting spin glass with
ferromagnetic bias and a transverse field in the infinitep limit" (Poster, Topic 9, P156)
Informal presentations
 Tomoyuki Obuchi
"Statistical mechanical approach to sparse approximation problem" (Technische Universität Berlin, Berlin, Germany, 2009/3/10)
 Tomoyuki Obuchi
"Complex Replica Zeros of ±J Ising Spin Glass at Zero Temperature" (Universita degli Studi di Roma “La Sapienza", Rome, Italy 2009/3/10)