相关基金:National Natural Secience Foundation of China (11071064) ; the National Natural Science Foundation of Hainan Providence (111006,113004) Acknowledgement The author would like to thank the referee for his/her careiully reading and valuable suggestions.
First, the equivalence of a family of semi-norms and the standard one on the Schwartz space is established. Then a direct proof of the representation of tempered distributions is given.