布尔代数定律_布尔代数的公理和定律布尔代数定律A+A =A Boolean Algebra differs from both general mathematical algebra and binary number systems. In Boolean Algebra, A+A =AA.A = A, becau the variable A A has only logical val
第21卷第4期宝鸡文理学院学报(自然科学版)VO1.21NO.4 2001年12月JOurna1Of BaOji CO11ege Of ArtS and Science(Natura1Science)Dec= ===============================================================.2001 ETFM方法和非线性波方程的精确解姚若霞1李志斌2(