刻画了在非负无零因子交换半环上强保持可逆矩阵的线性算子。

The linear operators that strongly preserve invertible matrices over some antinegative commutative semirings with no zero divisors were characterized.

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刻画了在非负无零因子交换半环上强保持可逆矩阵的线性算子。

Then T is an invertible linear operator preserving rank - partial ordering on Sn(F) if and only if there exists an invertible matrix (F) such that where .

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应用有界线性算子半群理论证明一类成批服务系统的解的存在唯一性和非负性。

In this paper, by using C0-semigroup theory the existence of a unique positive time-dependent solution of a bulk service queue with finite waiting space is proved.

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