This paper gives some relation of U. S. C. and L. S. C. of set-valued mappings with closed and open property of image.
本文给出了集值映射的上半连续性和下半连续性同图象的闭性和开性间的一些关系。
2
Statutory Provision: 18 U. S. C. § 2243(a). For additional statutory provision(s), see Appendix A (Statutory Index).
法律规定：《美国法典》第18编第2243（a）节。其他法律规定，参见附录A（法令索引）。
3
First it was the U. S. Bureau of Engraving and Printing's next-generation $100 bill production process, in Washington, D. C. On Wednesday, it was the U. S. Mint here, to see how coins are made.