This monthly journal, begun in 1950, is devoted entirely to research in pure and applied mathematics, principally to the publication of original papers of moderate length. A section called Shorter ...

We consider an elliptic system of Hamiltonian type on a bounded domain. In the superlinear case with critical growth rates we obtain existence and positivity results for solutions under suitable ...

Body mass index, or BMI for short, is a measure of body weight based on your height. For decades, BMI has been a way to measure whether someone is at a healthy weight. In general, people are ...

Whether you need to scan family photos, piles of documents, or expense receipts, we've tested the top scanners to help you find the one built for the task. Since 2004, I have worked on PCMag’s ...

Thomas J. Brock is a CFA and CPA with more than 20 years of experience in various areas including investing, insurance portfolio management, finance and accounting, personal investment and financial ...

We get it, you're busy. Here are 10 things that came up this week that you should be aware of. View Gallery ...

Debt-to-income ratio shows how your debt stacks up against your income. Lenders use DTI to assess your ability to repay a loan. Many, or all, of the products featured on this page are from our ...

Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market Technician ...

A maths optical illusion is a fascinating trick where numbers, shapes, or patterns deceive our brain into seeing something different from the mathematical reality. These illusions use geometry, ...

Harry Potter series author J.K. Rowling first came under fire in early June 2020 for controversial tweets she posted about the transgender community. Her stance has caused fans and stars of the ...