PURPOSE:To miniaturize a circuit constitution and to economize by providing a quantizing circuit frequency-dividing an input basic clock signal, a clock circuit generating a clock signal for up-down counter or the like, plural latch circuits and a ROM, etc. CONSTITUTION:A phase control data input...
洗大脑 满脑子susususupernova aespa《Supernova (超新星)》https:// y.music.163.com/m/song?fx-wechatnew=t1&fx-wxqd=c&fx-wordtest=&id=2160418335&PlayerStyles_SynchronousSharing=&fx-listentest=t3&uct2=6...
若 A,B都有上界,并设E的上界为supE,则由 E=A∪B ,x ∈ A(或x∈B)=x∈E.于是,x≤supE,即数supE是数集A(或 B)的一个上界,而数supA(或supB)是A(或B)的最小上界.故有 supA(或 supB)≤supE.从而证得 supE≥max\(supA,supB\) . 又由Vx∈ E,有x∈ A(或x∈ B)→x≤supA(或x...
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