Australian Stock Saddle much deeper seat, higher cantle, and knee pads in the front to create a very secure saddle for riders who ride in rough conditions or spend long hours on a horse. The saddle is kept on with a girth attached to billets under the flaps, similar to those on a dressage saddle. A surcingle passing over the seat of the saddle is also used to provide additional safety. The rear of the saddle is sometimes secured by a crupper. A breastcollar is sometimes added. A saddle blanket or numnah is used under the saddle to absorb sweat and to protect
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