Graph theory is generally thought of as originating with the “Königsberg bridge problem,” which asked whether a walker could cross the seven bridges of Königsberg, Prussia (now Kaliningrad, Russia), once each without crossing any of them twice. This is the graphical depiction of the problem, where the nodes represent land masses and the edges bridges. (Credit: Horatius/Wikimedia Commons) An algori
The Kurzweil Library catalogs advances in tech, science, and world progress that are shaping tomorrow. It features a hand-picked digest of stories + resources. Published by Ray Kurzweil — the inventor, best-selling author, and futurist — the collections explore themes from his landmark non-fiction books. This official website is also home to the complete set of his writings + commentary. Ray is cu
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