ABSTRACT: The aim of this paper is to study the 3x + 1 problem based on the Collatz iterative formula. It can be seen from the iterative formula that the necessary condition for the Collatz iteration ...
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The roots of Minnesota's tick problem
An insect known for carrying debilitating diseases wasn't always on Minnesotans' radar. In this Good Question, Jeff Wagner digs into the history of ticks in our region and why concern has never been ...
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