For positive real numbers x and y with x≠y, and for parameter r∈R, let Mr(x, y), L(x,y) and I(x,y) denote the power, logarithmic and identric means of x and y, respectively.
设Mr(x,y)、L(x,y),和I(x,y)依次为x、y的幂平均、对数平均和幺元平均(具体由2-4式定义)。
Some new characterizations of right cancellative monoids by condition(W_p);
条件(W_p)对右可消幺半群的一些新刻画(英文)
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