Interpretation over a singleton Let I be , and σ ∈ ΣI. 1. I(A)(σ) = I(∀xA)(σ). 2. I(t)(σ) = a. 3. I(Sx1,···,xn t1,···,tn A)(σ) = I(A)(σ). 4. I0(P), σ(P) ∈ {I(n), Ψ(n)} for every n-ary predicate constant (variable), where

Interpretation An interpretation I of F is , where D is a non-empty set called the domain of individuals. I0 is a mapping defined on the constants of F satisfying 1. If c is an individual constant, then I0(c) ∈ D. 2. If f n is an n-ary function constant, then I0(f n) : Dn → D

Substitutivity of Equivalence Let A,M and N be wffs and let AMN be the result of replacing M by N at zero or more occurrences (henceforth called designate occurrences) of M in A. 1. AMN is a wff. 2. If |= M ≡ N then |= A ≡ AMN

第二章平面汇交力系与平面力偶系 2.1已知F1=100N,F2=50N,F3=50N; 求力系的合力。 解由解析法,有

5-1已知A[n]为整数数组,试写出实现下列运算的递归算法: (1)求数组A中的最大整数。 (2)求n个整数的和。 (3)求n个整数的平均值。 【解答】 include

第2章线性表 要求: 1、掌握线性表的逻辑结构; 2、线性表的顺序存储表示及其算法; 3、线性表的链式存储表示及其算法 教材习题参考解答: 2.1略 2.2(1)n/2与(n-1)/2n (2)也(一定)不一定 (3)L->next上一元素结点的指针域指示

一、叙述下列概念的定义(5分×4=20分): 1.随机试验 2. Bernoulli概型 3.随机变量ξ,n的相关系数 4.随机变量序列{n}(n=1,2,…)依分布收敛于随机变量

1.1行列式 1.计算下列排列的反序数: (i)523146879; (ii)n,n-…,2 ()2k,,2k-1,2,…,k+1,k 2.假设n个数码的排列,2,,的反序数是,那么排列inn1的

字符串(String) 字符串是n(≥0)个字符的有限序列, 记作S:“C123…n 其中,S是串名字 “C2C3是串值 c是串中字符 n是串的长度

Codes in binary system BCD codes: for decimal digit Gray code: for numbers in binary system; AsCIi code: for characters ey point Use n bits. we can make 2n different words: To make n code-words. you must use logn bits