Search results
Results from the Think 24/7 Content Network
The pound per square inch (abbreviation: psi) or, more accurately, pound-force per square inch (symbol: lbf/in 2), [1] is a unit of measurement of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force with magnitude of one pound-force applied to an area of one square inch .
Digamma function. In mathematics, the digamma function is defined as the logarithmic derivative of the gamma function: [1] [2] [3] It is the first of the polygamma functions. This function is strictly increasing and strictly concave on , [4] and it asymptotically behaves as [5] for complex numbers with large modulus ( ) in the sector with some ...
The function , for x < 107. In mathematics, the Chebyshev function is either a scalarising function ( Tchebycheff function) or one of two related functions. The first Chebyshev function ϑ (x) or θ (x) is given by. where denotes the natural logarithm, with the sum extending over all prime numbers p that are less than or equal to x .
Public Services International. Public Services International ( PSI) is the global union federation for workers in public services, including those who work in social services, health care, municipal services, central government and public utilities. As of November 2019, PSI has 700 affiliated trade unions from 154 countries representing over 30 ...
You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.
Psi Chi ( ΨΧ) is a college student honor society in psychology with international outreach founded in 1929 at the University of Kansas in the United States. [1] Psi Chi is one of the largest honor societies in the United States, with more than 1,160 chapters. Psi Chi has more than 800,000 members from chapters in the United States, Canada ...
Population Services International (PSI) is a 501(c)(3) registered nonprofit global health organization that began as an international not-for-profit provider of contraception and safe abortion services, and has evolved into developing and deploying programs today that target malaria, child survival, HIV, and reproductive health.
x. AOL works best with the latest versions of the browsers. You're using an outdated or unsupported browser and some AOL features may not work properly.