Horse blanket rear, but usually it has no other straps or attachments. It is intended to be used on a horse while the animal is being led or held by a person, and not left on an unattended horse. In windy weather, a loose surcingle may be added to prevent the cooler from blowing completely off. A traditionally-shaped blanket of loosely crocheted cotton, called an "anti-sweat sheet", is used to absorb moisture. Often used alone to wick moisture from the surface of the horse, if placed under a cooler, it is removed when it becomes wet. A "barrier blanket" is sometimes used
Matroid girth spark of a matrix. The girth of a binary matroid gives the cardinality of a minimum even set, a subcollection of a family of sets that includes an even number of copies of each set element. Determining the girth of a binary matroid is NP-hard. Additionally, determining the girth of a linear matroid given by a matrix representing the matroid is W[1]-hard when parameterized by the girth or by the rank of the matroid, but fixed-parameter tractable when parameterized by a combination of the rank and the size of the underlying field. For an arbitrary matroid, given by a independence