In this paper, we introduce the notion of involution commutative semi-group, and give some equivalence axioms of MV - algebras.

本文通过对合交换半群概念的引入，对MV -代数建立了几组等价公理系，对原有的公理系进行了较好的简化。

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The existence of a tensor product is proved in the left quasi-normal band category, and the relationship with the tensor product in the semi-group category is provided.

证明左拟正规带范畴中张量积的存在性，并证明了它与半群张量积的关系，同时给出半格在左拟正规带范畴中张量积与在半格范畴中张量积之间的关系。

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The semi-group theory and the mathematical distribution theory in particle physics are reviewed.

本文是近年来粒子物理学中应用半群工具的一个集中评述。

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A militia group in Ohio posted a video on the Internet of a man with an altered voice holding a semi-automatic assault rifle.

VOA: standard.2009.08.17

The Arms Park region, number one seeds in the Heineken Cup, topped English giants Leicester Tigers, Bath and Sale Sharks to qualify for Saturday's semi from Group B when the Blues will face Group D winners Northampton Saints at Coventry's Ricoh Arena.

BBC: Williams to miss cup semi-final

Two teams will qualify from each group for the semi-finals and for the group Bobo Dioulasso group of death, the North Africans travel to Burkina Faso with the best qualifying record.

BBC: Under-20 draw gives Group of Death

For this story of semi-anonymous group heroism, he uses actual professionals (pilots, flight attendants, an air-traffic controller) mixed in with largely unknown actors, and avoids visual or verbal rhetoric.

NEWYORKER: United 93