Stretching from the ancient Chinese capital of Xian across the expanses of Central Asia to Rome, the Silk Road was, for 1,500 years, a vibrant network of arteries that carried the lifeblood of nations across the world. Along a multitude of routes everything was exchanged: exotic goods, art, knowledg[...]

Iintroductory treatment emphasizes graph imbedding but also covers connections between topological graph theory and other areas of mathematics. Authors explore the role of voltage graphs in the derivation of genus formulas, explain the Ringel-Youngs theorem, and examine the genus of a group, includi[...]

Every day scientists learn more about how the body adapts to the stress of running-and how various body systems contribute to running performance. Leading the charge is a fresh generation of brilliant young exercise physiologists including Ross Tucker and Jonathan Dugas, whose work has demolished ma[...]