If true, the following conjecture of Thomassen [Th81] is a planarity criterion for a special class of graphs that involves only K 5. Recall that a planar graph on n vertices contains at most 3n-6 ...

Editor’s Note: Comparisons for individual segments are updated each month to reflect the government’s revisions to its year-ago figures. A full methodology for how Retail Dive tracks retail sales ...

You should be using a password manager. Data breaches now happen frequently, and that wealth of stolen info has made cracking passwords even easier. It’s not just ...

The Rasmussen Reports daily Presidential Tracking Poll for Friday shows that 45% of Likely U.S. Voters approve of President Trump’s job performance. Fifty-three (53%) disapprove. The latest figures ...

While hastily planned remote instruction differs from fully planned online college programs, education experts say recent cultural shifts and a desire for flexibility accelerated the growth of online ...

A noisy construction site may be an unorthodox setting for a bedtime story, but newcomer Rinker and Lichtenheld (Shark vs. Train) tie together the dual themes neatly. Though more subdued than the ...

China’s assertiveness in the South China Sea has steadily increased, resulting in heightened tensions with Southeast Asian claimant states, particularly the Philippines, at the Second Thomas Shoal in ...