Tin tức nổi bật
Hội thảo sắp diễn ra
27/09/25, Hội nghị, hội thảo:
Gặp gỡ Toán học 2025 - Hội thảo Khoa học các nhà nghiên cứu trẻ"
06/11/25, Hội nghị, hội thảo:
Lectures on selected areas in Pure Mathematics
24/11/25, Hội nghị, hội thảo:
Hội nghị toàn quốc lần thứ VII “Xác suất - Thống kê: Nghiên cứu, ứng dụng và giảng dạy”
Xuất bản mới
Nguyễn Hữu Sáu,
Piyapong Niamsup,
Vũ Ngọc Phát,
Linear Programming Approach to Constrained Stabilization of Positive Differential-Difference Equations With Unbounded Delay,
Optimal Control Applications and Methods, 2025; 46:2581--2594
(SCI-E, Scopus)
.
Đỗ Hoàng Sơn,
Vũ Đức Việt,
Quantitative stability for the complex Monge-Ampère equations II,
Calculus of Variations and Partial Differential Equations 64 (2025), no. 8, Paper No. 269
(SCI-E, Scopus)
.
Giang Trung Hiếu,
Existence and uniqueness results for a nonlinear Budiansky-Sanders shell model,
Journal of Engineering Mathematics, Volume 151, article number 5, (2025)
(SCI-E, Scopus)
.
Cohen--Macaulayness of a class of graphs versus the class of their complements
Người báo cáo: Đỗ Trọng Hoàng
Time: 9:30 - 11:00, March 01, 2023.
Venue: Room 612, A6, Institute of Mathematics, VAST
Abstract: Let $ngeq2$ be an integer. The graph $G(n)$ is obtained by letting all the elements of ${0,ldots,n-1}$ to be the vertices and defining distinct vertices $x$ and $y$ to be adjacent if and only if $gcd(x+y,n)=1$. In this talk, well-coveredness, Cohen--Macaulayness, vertex-decomposability and Gorensteinness of these graphs and their complements are characterized. These characterizations provide large classes of Cohen--Macaulay and non Cohen--Macaulay graphs. This is a joint work with T. Ashitha, T. Asir, and M. R. Pournaki.