翻译:急减C∞类函数 同义词1)rapidly decreasing C∞ function,急减C∞类函数2)c function,c类函数3)function of class C∞,C∞类函数4)C~(1,1)functions,C~(1,1)函数类5)rapidly decreasing distribution,急减广义函数6)slowly increasing C∞ function,缓增C∞类函数