On April 8, 1796, the German mathematician Carl Friedrich Gauss [1]proved the quadratic reciprocity law (the ability to determine the solvability of any quadratic equation in modular arithmetic.)
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Today’s feature piece is a guest post that was too short to qualify as an entry for the SurvivalBlog non-fiction writing contest [2]. More than $984,000 worth of prizes have been awarded since we started running the contest. Round 124 ends on May 31st, so get busy writing and e-mail [3] us your entry. Remember that there is a 1,500-word minimum, and that articles on practical “how-to” skills for survival have an advantage in the judging. In 2023, we polled blog readers, asking for suggested article topics [4]. Please refer to that poll if you haven’t yet chosen an article topic.