Abstract: To address the complexities of spatial non-stationary (SnS) effects and spherical wave propagation in near-field channel estimation (CE) for extremely large-scale multiple-input ...

Given an integer array nums, you need to find one continuous subarray such that if you only sort this subarray in non-decreasing order, then the whole array will be sorted in non-decreasing order.

Tens of thousands of shoppers are reporting widespread problems using Amazon’s website, according to reports from outage tracker Downdetector. As of 3:45 p.m. ET on Thursday, March 5, reports of ...

Based on over 20,000 reports, Amazon appears to be experiencing an outage. According to Downdetector, reports of problems started increasing at 1:41 pm ET today. By 2:26 pm, ET, Downdetector received ...

In a dark room, in the middle of the night, a woman lies dreaming. Suddenly, her eyes beneath their lids dart crisply left-right, left-right. The eye signal means she knows she’s dreaming. Lucid ...

Elementary school teachers report increasing behavioral problems among young students. Schools are helping to better train teachers to deal with classroom behavior issues. Elementary teachers say they ...

The verdict, it seems, is in: artificial intelligence is not about to replace mathematicians. That is the immediate takeaway from the “First Proof” challenge—perhaps the most robust test yet of the ...

PCWorld reports that Windows 11 update KB5077181 is causing critical boot loops and login failures for users after installation. The problematic February update ...

What are the most pressing global crises in 2026? Each year, the International Rescue Committee’s (IRC) Emergency Watchlist identifies the countries at greatest risk of new or worsening humanitarian ...

There were ten problems overall across diverse mathematical fields, including stochastic analysis, spectral graph theory, symplectic geometry, and algebraic topology. The researchers tested the ...

Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...