Learn how GROUPBY passes both subset and full arrays into LAMBDA in Excel, letting you compute percent shares fast and explain results clearly.

I recently saw a coworker type out a SUM formula in Excel to get a quick total, only to delete it a second later. When I showed him a pro shortcut hidden in plain sight, he realized he'd been wasting ...

A team of researchers affiliated with UNIST has made a significant breakthrough by mathematically proving that a special type of vortex pair, called the Sadovskii vortex patch, can exist within ideal ...

MOVING WALL The "moving wall" represents the time period between the last issue available in JSTOR and the most recently published issue of a journal. Moving walls are generally represented in years.

This title is part of a longer publication history. The full run of this journal will be searched. TITLE HISTORY A title history is the publication history of a journal and includes a listing of the ...

The Math Resource Center is a proud member of the McGonigal ARC –the Drexel Academic Resource Center– located in Korman. The ARC is an integrated hub of on-campus academic support services focused on ...

From attraction to action, sexual behavior takes many forms. As pioneering sex researcher Alfred Kinsey put it, the only universal in human sexuality is variability itself. Human interest in sex can ...

RRB Section Controller Syllabus 2026: The Railway Recruitment Board (RRB) examines the Section Controller post. The RRB Section Controller exam is scheduled for 11 and 12 February 2026. The complete ...

National Mathematics Day 2025: Celebrated on December 22, National Mathematics Day marks the birth anniversary of legendary Indian mathematician Srinivasa Ramanujan. The day honours Ramanujan’s legacy ...

National Mathematics Day is observed every year today to commemorate the birth anniversary of Srinivasa Ramanujan, one of India’s most influential and globally recognised mathematicians. The day will ...

Microsoft Excel has been the premier spreadsheet software for decades, since outdoing the once venerable Lotus 1-2-3, the first killer app for PCs in the 1980s. And Excel's dominance has yet to be ...