“The 2000 Sculpture” (1992), by Walter De Maria, an example of his groupings of ordered elements using precise measurements.Credit...Museum Associates/LACMA Walter De Maria, a reclusive American sculptor whose multifaceted achievement and sly Dadaist humor helped give rise to earthworks, Conceptual Art and Minimal art, on an often monumental scale, died on Thursday in Los Angeles. He was 77 and li