“The Eve of Never Leaving” is the title of a poem by Álvaro de Campos, a melancholy Portuguese writer who was obsessed with time, existence, and the void. Tatiana Trouvé is an artist who shares these themes. Her drawings, installations, and cast and carved sculptures mix fragments from nature with things man-made to communicate ideas about memory and object durability. A piece by Trouvé can seem eerily familiar, yet you can’t quite remember why. This is Trouvé’s first solo exhibition in L.A. —E.C.