Which teacher's ideas about composition strongly influenced Georgia O'Keeffe's abstract drawings?

Arthur Wesley Dow's ideas about composition strongly influenced Georgia O'Keeffe's abstract drawings. She encountered his teaching through Alon Bement at the University of Virginia, where she attended summer courses in 1912.

Dow promoted an approach based on the organized use of line, color, and tone. Instead of treating art as a strict imitation of nature, his system encouraged students to build visually balanced compositions from fundamental elements.

O'Keeffe later taught and made a series of abstract charcoal drawings that developed this approach in her own way. In 1916, Anita Pollitzer showed some of those drawings to Alfred Stieglitz, who exhibited them at his New York gallery.

Dow did not directly teach O'Keeffe for most of her career, and she did not simply copy his style. His importance was conceptual: his teaching gave her a framework for pursuing abstraction and personal expression.