of this series [1], [2], and [3], we have observed: interpretation of multiplication of a matrix by a vector, the physical meaning of matrix-matrix multiplication, the behavior of several special-type matrices, and visualization of matrix transpose. In this story, I want to share my perspective on what lies beneath matrix inversion, why different formulas related to inversion are the way …

NEW YORK — Astronomers have spotted the brightest fast radio burst yet coming from a nearby galaxy. Observations of this phenomenon, a powerful flash of radio waves that lasts only about one millisecond, could shed light on one of the most mysterious cosmic phenomena ever studied. Fast radio bursts, or FRBs, were first discovered in 2007, but their exact sources …

🔥 Trending now in : Katy Perry Posts Big Ticket Sales for The Lifetimes Tour Singer Katy Perry has sold 1.1 million tickets on The Lifetimes tour and grossed more than $80 million in sales, according to figures provided by her management. The $80 million covers Perry’s shows in the U.S., Canada and Australia. Live Nation backed the U.S. and …