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Trees to Flows and Back: Unifying Decision Trees and Diffusion Models
Computer Science > Machine Learning [Submitted on 1 May 2026 (v1), last revised 21 May 2026 (this version, v2)] Title:Trees to Flows and Back: Unifying Decision Trees and Diffusion Models View PDFAbstract:Decision trees and diffusion models are ostensibly disparate model classes, one discrete and hierarchical, the other continuous and dynamic. This work unifies the two by establishing a crisp mathematical correspondence between hierarchical decision trees and diffusion processes in...
Country diary: Trees growing out of trees – the more I look, the more I find them | Merryn Glover
Badenoch, Cairngorms: It started with a tiny Scots pine growing out of a huge old birch, but soon I find more examples of this strange magicThe sight pulls me up short. It looks like something out of myth or a book of spells. Here is a miniature Scots pine growing 6ft up, right in the fork of a shaggy old birch.
Country diary: Trees growing out of trees – the more I look, the more I find them | Merryn Glover
Badenoch, Cairngorms: It started with a tiny Scots pine growing out of a huge old birch, but soon I find more examples of this strange magicThe sight pulls me up short. It looks like something out of myth or a book of spells. Here is a miniature Scots pine growing 6ft up, right in the fork of a shaggy old birch.
Finding and saving the world's biggest trees before they disappear
Finding and saving the world's biggest trees before they disappear Wed 10 Jun 2026 at 4:30am Found on the island of Taiwan, "The Heaven Sword" is the tallest tree in East Asia. Measured at a whopping 84.1 metres tall, the 1000-year-old tree is five times the height of Queensland's Big Pineapple, and belongs to an ancient cypress species. Despite its seemingly unmissable height, it was only found a few years ago through a decade-long project to map Taiwan's tallest trees.
Campaigners ‘gobsmacked’ as garden containing original Bramley apple tree sold
Campaigners ‘gobsmacked’ as garden containing original Bramley apple tree sold The famous tree has spawned millions of saplings worldwide - Bookmark - CommentsGo to comments The garden housing the original Bramley apple tree has been sold, leaving campaigners who wanted to turn it into a heritage site "gobsmacked". The over 200-year-old tree spawned millions of saplings worldwide. It was sown by Mary Ann Brailsford in her parents’ garden in Church Street, Southwell, Nottinghamshire, between...
CATPO: Critique-Augmented Tree Policy Optimization
Announce Type: new Abstract: Reinforcement learning with verifiable rewards (RLVR) has become a dominant paradigm for improving the reasoning capabilities of large language models (LLMs). Recent tree-based methods such as TreeRPO extend flat trajectory sampling with tree-structured rollouts to obtain dense, step-level reward signals without a separate process reward model. However, not all trees are equally informative: trees where all leaves succeed, all leaves fail, or the policy already...
Forecasting with Hyper-Trees
arXiv:2405.07836v5 Announce Type: replace Abstract: We introduce Hyper-Trees as a novel framework for modeling time series data using gradient boosted trees. Unlike conventional tree-based approaches that forecast time series directly, Hyper-Trees learn the parameters of a target time series model, such as ARIMA or Exponential Smoothing, as functions of features. These parameters are then used by the target model to generate the final forecasts.
Plans for a new Dollar Tree divides ritzy Michigan suburb
Plans for a new Dollar Tree divides ritzy Michigan suburb Concerned residents have launched a Change.org petition with more than 500 signatures opposing the Dollar Tree - Bookmark - CommentsGo to comments The planned introduction of a Dollar Tree in a wealthy Michigan city has divided the residents, according to a new report. A Dollar Tree store will be built in Birmingham, an affluent city north of Detroit, but some residents fear the store will invite criminal activity and will reflect...
Statistical inference of the Tree of Blobs of a phylogenetic network from quartet concordance factors
A phylogenetic network represents evolutionary relationships involving hybridization, gene flow, or admixture. While the full network may not be identifiable from genomic data under common coalescent models, its tree of blobs, depicting only the tree-like portions of the network structure, is. We introduce ECToBlob (Edge Contraction for Tree of Blobs), a new statistically-consistent algorithm to estimate the tree of blobs from quartet concordance factors.
Analytic patch trees: branch interface inheritance and fractal dimension fields
Announce Type: new Abstract: The extension of the analytic fractal curve trees of (2601.17490} to analytic surface patch trees reveals a new geometric structure: branch points are replaced by interface curves that transmit the full analytical state of parent patches to their children. These interfaces prove to be central in determining the topology of the surface patch trees, including for the conditions for self-similarity of the interfaces, the patches and thus the trees. We establish the...