Graph theory examines mathematical structures in which objects are represented as vertices connected by edges. It provides the language and tools to model networks in computer science, biology, social ...

Extremal graph theory seeks the largest or smallest structure a graph can exhibit under given constraints, typically by forbidding a particular subgraph. The classical Turán problem determines the ...

2 News Problem Solvers listens to the community and works to hold people accountable and get answers needed. If you need an issue addressed call the Problem Solvers at 918-748-1502 or email ...

Whenever someone sends me a question about how to fix their Wi-Fi, I wince. It’s not that I dislike helping people with their router problems. In fact, there are few geeky endeavors I find more ...

Heart valve diseases affect how blood flows through the heart muscle. Symptoms of heart valve disease can be subtle or develop slowly over time, with extreme fatigue often being the first sign.

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Pete Rathburn is a copy editor and ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Susan Bard, MD, is a board-certified general and procedural dermatologist with the American Board of Dermatology and a Fellow of the American College of Mohs Surgery. Some of the most common skin ...