An upper bound for the Frobenius number and stretched numerical semigroups, 第45回可換環論シンポジウム, 京都, 2024/11/21. (衛藤和文,沼田崇宏,渡辺敬一との共同講演)
Numerical semigroup rings - A foundation of combinatorial perspective on commutative algebra, Interactions of Commutative Algebra, Representation Theory, and Combinatorics in Bangkok, Bangkok (Thailand), 2024/10/30.
Nearly Gorenstein local rings defined by maximal minors of a $2 \times n$ matrix , International Meeting on Numerical Semigroups 2024, Jerez de la Frontera (Spain), 2024/7/11.
1次元解析を基盤とした局所環論, 第68回代数学シンポジウム, 名古屋, 2023/8/30/.
Numerical semigroup rings with determinantal defining ideals, One day workshop on Commutative Algebra, Tokyo, 2023/2/6
Ulrich ideals in numerical semigroup rings
, 東京可換環論セミナー, オンライン, 2021/10/12.
Efficient generation of ideals in core subalgebras of the polynomial ring $k[t]$ over a field $k$
, The 8th China–Japan–Korea International Symposium on Ring Theory, Nagoya, 2019/8/27.
The GGL property of numerical semigroup rings obtained by gluing
, The 10th Japan-Vietnam Joint Seminar on Commutative Algebra, Hanoi (Vietnam) 2018/9/11.
The generalized Gorenstein property and numercal semigroup rings obtained by gluing
, INdAM meeting : international meeting on numerical semigroups, Cortona (Italy), 2018/9/6.
Pseudo-Frobenius numbers versus defining ideals in numerical semigroup rings
, 第39回可換環論シンポジウム, 京都, 2017/11.
Pseudo-Frobenius numbers versus defining ideals in numerical semigroup rings
, International Conference on Commutative Algebra and its Interactions to Combinatorics, Discrete Geometry and Singularity Theory, Hanoi (Vietnam), 2017/9.
Pseudo-Frobenius numbers and the generation of the defining ideal
, 第28可換環論セミナー, 山口, 2017/2.
The minimal free resolution of a numerical semigroup ring with arithmetic pseudo-Frobenius numbers of type 3
, Japan-Vietnam Workshop on Commutative Algebra, 2016 -by and for young mathematicians-, 川崎, 2016/9.
On the almost Gorenstein property in Rees algebras of contracted ideals
, The 8th Japan-Vietnam Joint Seminar on Commutative Algebra, Hanoi (Vietnam), 2016/3.
The almost Gorenstein Rees algebras of contracted ideals
, 2016年日本数学会年会, つくば, 2016/3. (後藤四郎, 谷口直樹, 吉田健一 との共同講演)
Minimal free resolutions of certain almost Gorenstein numerical semigroup rings
, Workshop on Commutative Algebra, Ha Long (Vietnam), 2016/1.
The almost Gorenstenness of Rees algebras of contracted ideals in 2-dimensional regular local rings
, The JV Seminar on Commutative Algebra - by and for young mathematicians -, Kawasaki, 2015/9.
The almost Gorenstein Rees algebras of socle ideals
, 2015年日本数学会秋季年会, 京都, 2015/9. (後藤四郎, 谷口直樹, 吉田健一との共同講演)
Ratliff-Rush closures of certain 2-dimensional monomial ideals and Buchsbaumness of its Rees algebras
, Nebraska Commutative Algebra Conference: WiegandFest, Nebraska (USA), 2005/5.