Credit card issuers first assign the account numbers and then compute steps one through three of the Luhn algorithm to determine the appropriate check digit. In this case, the card number should have ...

You’re at the checkout screen after an online shopping spree, ready to enter your credit card number. You type it in and instantly see a red error message ...

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 ...

You, too, can be a state-of-the-art sign-stealer. You can play along at home and download The Athletic’s homemade version of the sign-cracking algorithm, while we ...

The author presents a rapidly convergent algorithm to solve the general portfolio problem of maximizing concave utility functions subject to linear constraints. The algorithm is based on an iterative ...

Only recently, progress has been made in obtaining o(log (rank))-competitive algorithms for the matroid secretary problem. More precisely, Chakraborty and Lachish ...