What Is the Luhn Algorithm? The Math Behind Credit Card Transactions Find out how this simple algorithm from the 1960s catches your typos Jack Murtagh Tue, August 12, 2025 at 8:30 AM PDT 6 min read ...

Thank you for printing the lively article “A Storied Approach to Operations Research” (Notes from Academe, June 14), about Gene Woolsey of the Colorado School of Mines. ... I was especially struck by ...

A simple checklist of seven clinical signs and symptoms could be used to identify sick neonates during the first week of life with potentially life-threatening illnesses requiring referral to hospital ...