#### Filter Results:

- Full text PDF available (47)

#### Publication Year

1999

2018

- This year (8)
- Last 5 years (36)
- Last 10 years (53)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

- Jun-ya Gotoh, Akiko Takeda, Katsuya Tono
- Math. Program.
- 2018

In this paper a DC (Difference of two Convex functions) formulation approach for sparse optimization problems is proposed. First we provide an exact DC representation of the cardinality constraint byâ€¦ (More)

- Takayuki Gunji, Sunyoung Kim, Masakazu Kojima, Akiko Takeda, Katsuki Fujisawa, Tomohiko Mizutani
- Computing
- 2003

PHoM is a software package in C++ for finding all isolated solutions of polynomial systems using a polyhedral homotopy continuation method. Among three modules constituting the package, the firstâ€¦ (More)

An interesting combinatorial (enumeration) problem arises in the initial phase of the polyhedral homotopy continuation method for computing all solutions of a polynomial equation system in complexâ€¦ (More)

- Satoru Adachi, Satoru Iwata, Yuji Nakatsukasa, Akiko Takeda
- SIAM Journal on Optimization
- 2017

The state-of-the-art algorithms for solving the trust-region subproblem (TRS) are based on an iterative process, involving solutions of many linear systems, eigenvalue problems, subspaceâ€¦ (More)

- Tomohiko Mizutani, Akiko Takeda, Masakazu Kojima
- Discrete & Computational Geometry
- 2007

The polyhedral homotopy method, which has been known as a powerful numerical method for computing all isolated zeros of a polynomial system, requires all mixed cells of the support of the system toâ€¦ (More)

- Akiko Takeda, Mahesan Niranjan, Jun-ya Gotoh, Yoshinobu Kawahara
- Comput. Manag. Science
- 2013

Index tracking is a passive investment strategy in which an investor purchases a set of assets to mimic a market index. The tracking error, the difference between the performances of the index andâ€¦ (More)

- Akiko Takeda, Masashi Sugiyama
- ICML
- 2008

The Î½-support vector classification (Î½-SVC) algorithm was shown to work well and provide intuitive interpretations, e.g., the parameter Î½ roughly specifies the fraction of support vectors. Although Î½â€¦ (More)

DEMiCs is a software package written in C++ for computing the mixed volume of the Newton polytopes of a general semi-mixed polynomial system through dynamic enumeration of all mixed cells. Theâ€¦ (More)

- Jun-ya Gotoh, Akiko Takeda
- Comput. Manag. Science
- 2011

Several optimization approaches for portfolio selection have been proposed in order to alleviate the estimation error in the optimal portfolio. Among them are the norm-constrained varianceâ€¦ (More)

- Takafumi Kanamori, Akiko Takeda, Taiji Suzuki
- Journal of Machine Learning Research
- 2013

There are two main approaches to binary classification problems: the loss function approach and the uncertainty set approach. The loss function approach is widely used in real-world data analysis.â€¦ (More)