Mark Brasuell was a member of Edge for more than two decades before defecting last year to rival co-op Spark. Before he decamped, however, he gave over his Edge solo slot to a group show that he curated. It included four of Colorado's most noteworthy abstract artists, all of whom happen to be women: Sue Simon, known for her science-based abstractions, which often include formulas and equations; Terry Maker, who embraces the use of unusual materials, in this case sawed stacks of painted canvas; Ania Gola-Kumor, a painter working in an abstract-expressionist vocabulary; and Virginia Maitland, a master of color-field abstraction. It's interesting that Brasuell would select these particular artists, as their varied approaches are admittedly distinct — but he established the roster based solely on his admiration of and respect for each.