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Each wire branch — ending in sheet-metal trapezoid and triangular petals painted primary blue, yellow, red and white — holds the next aloft, like dancers balancing on each other’s shoulders.

During those experiments, Schwartz cut open a Möbius band and realized, “Oh, my God, it’s not the parallelogram. It’s a trapezoid.”

After a series of emergency meetings, the circle became a trapezoid.

So he pairs two pictures, one featuring pulpy dots and the other straight-edged triangles and trapezoids.

Most dynamic are the pictures in which jauntily arranged trapezoids, grouped tightly together, appear to fracture.