Knot Shadow

Knot sculpture by Nat Friedman. Albany, New York, 2000.

The continuous loop of a three-dimensional mathematical knot constructed from copper tubing casts a shadow that can vary greatly in appearance and complexity, depending on the viewpoint and light direction.

Photo by I. Peterson

Ten Tetrahedra

Solar System by Eve Torrence. Exhibition of Mathematical Art, Joint Mathematics Meetings, San Francisco, California, 2010.

Photo by I. Peterson

Misty Mountain Gap

Great Smoky Mountains National Park, Tennessee, 1981.

Photo by I. Peterson

Open House

Toronto, Ontario, 2015.

Photo by I. Peterson

Rectangle of Rectangles

St. George's Episcopal Church, Arlington, Virginia, 2018.

Photo by I. Peterson

Granny Pillow

Dihedral Granny Pillow by Andrea Heald. Gallery of Mathematical Art, Joint Mathematics Meetings, Boston, Massachusetts, 2012.

Photo by I. Peterson

Snow Soldier

Washington, D.C., 1982.

Photo by I. Peterson

Fractured Flower

Design by Antoni Gaudi. Parc Guell, Barcelona, Spain, 2007.

Photos by I. Peterson

Dinner Roses

Toronto, 2011.

Photo by I. Peterson

Goldstein Tube

Goldstein (cathode ray) tube. Science Museum, London, England, 1975.

Photo by I. Peterson

Deep Pink

Hawaii, 1983.

Photo by I. Peterson

Station Lights

Central Station, Milan, Italy, 2010.

Photo by I. Peterson

Vegemite Place

Jaisalmer India, 2010.

Photo by I. Peterson

Rudder Ice

Kingston, Ontario, 1974.

Photo by I. Peterson

Ptolemy and Regiomontanus

This frontispiece from Epitoma in Almagestum Ptolemaei, published in 1496, shows its author, Regiomontanus, and a crowned Ptolemy.

Reproduced from the collections of the Library of Congress.

Madison Glow

Wisconsin State Capitol, Madison, Wisconsin, 2008.

Photo by I. Peterson

Shore Splash

Ocean City, Maryland, 1979.

Photo by I. Peterson

Fall Down

Devils Backbone Trail, Mark Twain National Forest, Missouri, 1980.

Photo by I. Peterson

Macdonald Chemistry

Macdonald Chemistry and Mining Building, McGill University, Montreal, Quebec, 2006.

Photo by I. Peterson

Rock Leaves

Photo by I. Peterson

Model Surface

Mathematics Department, University of Nebraska, Lincoln, Nebraska, 2012.

See also "Plaster Models of Mathematical Surfaces."

Photos by I. Peterson

Brooklyn Bridge

Brooklyn Bridge, New York City, New York.

Photo by I. Peterson

Elements 29

Elements Number 29 by Siah Armajani. Sculpture Garden, New Orleans Museum of Art, New Orleans, Louisiana, 2010.

Photo by I. Peterson

Five Plates Two Poles

Five Plates, Two Poles by Richard Serra, East Building, National Gallery of Art, Washington, D.C., 2017.

See also "Three of Five."

Photo by I. Peterson

American Way

Wall mural, Washington, D.C., 2018.

Photos by I. Peterson

Forest Rainbow

Rainy River, Ontario, 1977.

Photo by I. Peterson

Fragments in Flight

Market Street, Philadelphia, 2000.

Photos by I. Peterson

Glossy Orange

Photo by I. Peterson

Cathedral of Learning

Cathedral of Learning, University of Pittsburgh, Pittsburgh, Pennsylvania, 2010.

Photo by I. Peterson

Being Elderly

The Dignity of Being Elderly by Shirley Rush Dean. Bethesda, Maryland, 2018.

Photo by I. Peterson