Nico (right) and Matteo Mucchetti pose with their homemade dark ride vehicle. We may earn revenue from the products available on this page and participate in affiliate programs. When 12-year-old Matteo Mucchetti mapped out an amusement-style attraction that he wanted to create in his family's basement and then showed it to his older brother Nico, the high-school sophomore was immediately sold. "This is amazing," said Nico. "Let's make it!" Matteo had sketched on paper a top-down view of the multi-room space in Bear, Delaware, where they live.

Canonical Polyadic (CP) tensor decomposition is a workhorse algorithm for discovering underlying low-dimensional structure in tensor data. This is accomplished in conventional CP decomposition by fitting a low-rank tensor to data with respect to the least-squares loss. Generalized CP (GCP) decompositions generalize this approach by allowing general loss functions that can be more appropriate, e.g., to model binary and count data or to improve robustness to outliers. However, GCP decompositions do not explicitly account for any symmetry in the tensors, which commonly arises in modern applications. For example, a tensor formed by stacking the adjacency matrices of a dynamic graph over time will naturally exhibit symmetry along the two modes corresponding to the graph nodes. In this paper, we develop a symmetric GCP (SymGCP) decomposition that allows for general forms of symmetry, i.e., symmetry along any subset of the modes. SymGCP accounts for symmetry by enforcing the corresponding symmetry in the decomposition. We derive gradients for SymGCP that enable its efficient computation via all-at-once optimization with existing tensor kernels. The form of the gradients also leads to various stochastic approximations that enable us to develop stochastic SymGCP algorithms that can scale to large tensors. We demonstrate the utility of the proposed SymGCP algorithms with a variety of experiments on both synthetic and real data.

Tesla loses place as world's top electric vehicle seller to China's BYD Tesla has lost its place as the top global seller of electric vehicles to Chinese company BYD, capping a year defined by outrage over CEO Elon Musk's political manoeuvring and the end of United States tax breaks for customers. The company revealed on Friday that it had sold 1.64 million vehicles in 2025, compared with BYD's 2.26 million vehicles. The sales represented a 9 percent decline for Tesla from a year earlier. However, the market has become increasingly crowded with competitors, with China's electric vehicle market bounding ahead. Musk's embrace of US President Donald Trump in 2024 and subsequent spearheading of a controversial "government efficiency" panel (DOGE) behind widespread layoffs of federal workers has also proved polarising.

The company's shares are worth $1.4tn on the back of hopes for self-driving cars and robotics. The company's shares are worth $1.4tn on the back of hopes for self-driving cars and robotics. Tesla endured tough year in part thanks to some consumers' distaste for Elon Musk's embrace of rightwing politics Tesla has taken the unusual step of publishing sales forecasts that suggest 2025 deliveries will be lower than expected and future years' sales will be well below targets set by its chief executive, Elon Musk . The US electric vehicle maker published figures from analysts suggesting it will announce 423,000 deliveries during the fourth quarter of 2025, in a new "consensus" section on its investor website. That would represent a 16% decline from the final quarter of 2024.

A Florida man is facing multiple charges after he allegedly stole hundreds of pounds of avocados from a Miami-area grove with the intent to sell the avocados for money to buy his kids Christmas gifts.

Nude man arrested Christmas night after police say Vladimir Demidovich broke into two multimillion-dollar Golden Beach homes, including a $12 million residence.

Tiffany Lee Griffith, 36, accused of forcibly dunking a child underwater at Gaylord Palms Resort, was once recognized as Employee of the Quarter by the Punta Gorda Police Department.

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President Donald Trump teased potential new marble armrests at the Kennedy Center after a vote to rename the venue in his honor triggered a legal challenge.