----MATHEMATICALTERMS(Part1)calculus微积分definition定义theorem定理lemma引理corollary推论prove证明proof证明show证明solution解formula公式ifandonlyif(iff)当且仅当xXforallxXxXthereexistsanxXsuchthat使得given已知set集合finiteset有限集infiniteset无限集interval区间openinterval开区间closedinterval闭区间neighborhood邻域number数naturalnumber自然数integer整数oddnumber奇数evennumber偶数realnumber实数rationalnumber有理数irrationalnumber无理数positivenumber正数negativenumber负数----mapping映射function函数monotonefunction单调函数increasingfunction增函数decreasingfunction减函数boundedfunction有界函数oddfunction奇函数evenfunction偶函数periodicfunction周期函数compositefunction复合函数inversefunction反函数domain定义域range值域variable变量independentvariable自变量dependentvariable因变量sequence数列convergentsequence收敛数列divergentsequence发散数列boundedsequence有界数列decreasingsequence递减数列increasingsequence递增数列limit极限one-sidedlimit单