离散数学(Discrete Math)-命题逻辑
目录
逻辑命题Def:
Proposition 命题 :A proposition is a declaration that is either true or false but not both.
Truth Value 真值 :The truth value of a true (or false respectively) proposition is True (or false respectively) and denoted by T (or F respectively).
Ex:
- 太阳的英文是sun。是命题 为真命题
- 2+5=9 是命题 为假命题
- X+8=0 不是命题
- 今天天气不错哦。 不是命题
- 请递给我课本。 不是命题
Propositional Variables命题变量:Propositional Variables are variables that represent propositions,e.q: p,q,r…(小写)
propositions Caculus 命题运算 :The area of logic that deals with propositions is called propositions Caculus.
Compound Propositions 复合命题 : Compound Propositions are propositions that are formed from existing propositions using Logical Operators(逻辑算子).
Logical Operators 逻辑算子
Truth Table 真值表
logic puzzles 逻辑推理
算子运算符Def:
Negation Operator 否定运算符(横折 - )
例:
| P |
非P |
| 0 |
1 |
| 1 |
0 |
Conjunction Operator 连接运算符(∧ AND)
例:
| p |
q |
p∧q |
| 0 |
0 |
0 |
| 0 |
1 |
0 |
| 1 |
0 |
0 |
| 1 |

本文深入探讨离散数学中的命题逻辑,解析命题、真值、复合命题与逻辑算子等核心概念,详解真值表及逻辑运算定律,适合初学者入门及进阶学习。
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