Some rectangles of raw linen hanging on the walls made up one part of this solo show by American artist Helen Mirra. Creases in the canvases revealed that they had been folded numerous times, like maps. And maybe they are something like that. They belong to a series called “Hourly Directional Field Notations,” begun in 2011; the ones on view were created in Arizona in January 2012, during one of the many nature expeditions the artist has organized since 2010. Of course, you could never find your way through the desert with these works, and what appears on the fabric surfaces are not precise

The works in “Onça Geométrica” (Geometric Ounce), the recent exhibition by João Maria Gusmão and Pedro Paiva, take their inspiration from daily life, literature, philosophy, and the artists’ own fertile imaginations. In this, they are much like the duo’s earlier films, photographs, and sculptures, such as those included in the 2009 Venice Biennale, where the pair represented Portugal, and the most recent one, curated by Massimiliano Gioni. The artists’ eclectic repertoire of sources ranges from Sextus Propertius and Plautus through Victor Hugo and Alfred Jarry to Jorge Luis Borges and René