Collaborating Authors

Pension Systems' Costs Are Higher Than Reported, Panel Told

U.S. News

The Public School Employees' Retirement System says it's cooperating with requests for documents. Both it and the State Employees' Retirement System say they are working to expand their reporting of what they pay to private equity managers.

Astronomers spot triple star system being born

Daily Mail - Science & tech

Astronomers have found that multiple star systems can emerge from such unstable conditions, including a recently discovered triple protostar system. A disc of cosmic dust clustered around a young star has been spotted fragmenting into a multiple-star system for the first time, supporting theories on how such systems form. Throughout the universe, clouds of dust and gas accumulate until clusters begin to form (pictured). An artist's impression shows how the disc of stellar material rotating around the central protostar swirls and fragments (left). The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

Solving Random Quadratic Systems of Equations Is Nearly as Easy as Solving Linear Systems

Neural Information Processing Systems

We prove that it is possible to solve unstructured quadratic systems in n variables exactly from O(n) equations in linear time, that is, in time proportional to reading and evaluating the data. This is accomplished by a novel procedure, which starting from an initial guess given by a spectral initialization procedure, attempts to minimize a non-convex objective. The proposed algorithm distinguishes from prior approaches by regularizing the initialization and descent procedures in an adaptive fashion, which discard terms bearing too much influence on the initial estimate or search directions. These careful selection rules---which effectively serve as a variance reduction scheme---provide a tighter initial guess, more robust descent directions, and thus enhanced practical performance. Further, this procedure also achieves a near-optimal statistical accuracy in the presence of noise.

Connect your entire home with the eero WiFi System: All products are $100 off


There's always that one room in the house that everyone avoids because it's a dead zone -- meaning the WiFi isn't too hot. It's tough to find a WiFi system that will cover your entire home so you can enjoy being in every single space. All eero Home WiFi System Products are currently $100 off on Amazon -- with different options for various home sizes. This deal is live for today only, so act fast. It's discreet, simple to set up, and provides coverage all over your living space (also, they look really nice).

Here's When Fortnite's Refund System Returns To The Game And How It Works

Forbes - Tech

The self-service cosmetic V-Bucks refund system is returning to Fortnite by June 1st. Epic Games implemented a cosmetic refund system earlier this year and then quickly removed it from the game. That system is now returning according to emails players are receiving from Epic Games. The new self-service cosmetic refund system will return by June 1st according to these emails. It will allow customers to get refunded V-Bucks (not real money) on up to three cosmetic items total per account.