The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...

Welcome to Holland America Line, recognized for nearly 150 years as a leader in premium cruising. Today, our fleet of 14 ships visit more than 470 ports of call in 98 countries connecting with all ...

You can’t tell the difference. Looking south while sitting on Township Road 10, a grid road running along the 49th Parallel dividing Canada and the United States, you can’t tell the difference between ...

Abstract: The past decade has seen the rapid development of the robotic fish in many aspects. However, the velocity measurement problem has not been fully addressed, which limits the autonomy of the ...

Abstract: In recent years, various techniques have been applied to modeling radio-wave propagation in railway networks, each one presenting its own advantages and limitations. This paper presents a ...

This volume is an introductory level textbook for partial differential equations (PDE's) and suitable for a one-semester undergraduate level or two-semester graduate level course in PDE's or applied ...

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...