## Density of a Collection of Functions in $N_Î¦$-Spaces

J. Math. Sci. Univ. Tokyo
Vol. 7 (2000), No. 3, Page 449--461.

Bang, Ha Huy ; Thuong, Truong Van
Density of a Collection of Functions in $N_Î¦$-Spaces
This paper presents sufficient conditions for a translation invariant subspace of $L_1(\R^n)\cap N_Î¦(\R^n)$ to be dense in $N_Î¦(\R^n).$