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MAA FOUND MATH: Boyd Fulmer, an engineering student at the University of South Florida, took this photo of a helical staircase at the Dali Museum in St. Petersburg, FL. He writes, "This staircase is produced by the 3D space parametric equations: x=rcost, y=rsint, z= c t".
See math in the world around you? Send your photos to editor@maa.org.