Most veterinary eye specialists believe the actual cause of tear staining is excess tearing. When the face hair is wet from excess tearing it is the breeding ground for bacteria and yeast. One of the most common yeast infections is Ptyrosporin or Red Yeast which causes a deep reddish-brown stain.
Definition of assignment. 1  1 : the act of assigning something the assignment of a task. 2  2a : a position, post, or office to which one is assigned Her assignment was to the embassy in India.b : a specified task or amount of work assigned or undertaken as if assigned by authority a homework assignment.
(August 2012) The assignment problem is one of the fundamental combinatorial optimization problems in the branch of optimization or operations research in mathematics. It consists of finding a maximum weight matching (or minimum weight perfect matching) in a weighted bipartite graph.