I didn't feel like working yesterday, so I called in sick.
In the ring of integers, there are no zero divisors except 0. In a ring obtained from a Boolean algebra, on the other hand, every element except the identity is a zero-divisor. The concept of a zero-divisor is intimately related to cancellation law as we see n the following proposition. 1.7 Proposition: Let R be a ring and x∈R. Then for all y,x∈R, either of the equations xy=xz or yx=zx implies y=z if and only if x is not a zero divisor. In other words, cancellation by an element is possible iff it is not a zero-divisor.
The temptation of the hometowner is therefore the classic temptation of insularity, which equates (or confuses) interest with self-absorption.
Click the loudspeaker icon to configure audio settings.
アカウントを持っていませんか? 新規登録
アカウントを持っていますか? ログイン
DiQt(ディクト)
無料
★★★★★★★★★★