Перегляд за автором "Lezama, O."

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  • Matrix approach to noncommutative stably free modules and Hermite rings 
    Lezama, O.; Gallego, C. (Algebra and Discrete Mathematics, 2014)
    In this paper we present a matrix-constructive proof of an Stafford’s Theorem about stably free modules over noncommutative rings. Matrix characterizations of noncommutative Hermite and projective-free rings are exhibit. ...
  • Universal property of skew PBW extensions 
    Acosta, J,.P.; Lezama, O. (Algebra and Discrete Mathematics, 2015)
    In this paper we prove the universal property of skew $PBW$ extensions generalizing this way the well known universal property of skew polynomial rings. For this, we will show first a result about the existence of this ...