On Smooth and p times differentiable bump funtions
Tác giả: Đỗ Khắc ĐứcPhan Quang Thế
Nhà xuất bản: Journal of Science and Technology - The National Academy of Science and Technology, Vol. 45, No. 6 pp. 331-336
This note presents a simple way to construct smooth and p times differential bump functions, which can be used in a number of applications