We show that the number of unique function mappings in a neural network hypothesis space is inversely proportional to $\prod_lU_l!$, where $U_{l}$ is the number of neurons in the hidden layer $l$.
In this paper we analyze, evaluate, and improve the performance of training Random Forest (RF) models on modern CPU architectures. An exact, state-of-the-art binary decision tree building algorithm is used as the basis of this study. Firstly, we investigate the trade-offs between using different tree building algorithms, namely breadth-first-search (BFS) and depth-search-first (DFS). We design a novel, dynamic, hybrid BFS-DFS algorithm and demonstrate that it performs better than both BFS and DFS, and is more robust in the presence of workloads with different characteristics. Secondly, we iden…
Compute Allocation for Self-Evolving LLMs: From Depth-Breadth to Multi-Armed Bandits
University of Notre Dame(诺丁汉大学);Northeastern University(东北大学);University of Massachusetts Amherst(马萨诸塞大学阿默斯特分校);Southeast University(东南大学);Northwestern University(西北大学);Nanjing University(南京大学);Shanghai Artificial Intelligence Laboratory(上海人工智能实验室)
Autonomous Knowledge Graph Exploration with Adaptive Breadth-Depth Retrieval
Department of Biomedical Informatics, Harvard Medical School(哈佛医学院生物医学信息学系);Departamento de Computación, FCEyN, Universidad de Buenos Aires(布宜诺斯艾利斯大学计算机系);Department of Engineering Science, University of Oxford(牛津大学工程科学系);Oxford Suzhou Centre for Advanced Research, University of Oxford(牛津大学苏州市先进研究中心);ELIAS Lab, Departamento de Ingeniería, Universidad de San Andrés(圣安德鲁大学工程系ELIAS实验室);Kempner Institute for the Study of Natural and Artificial Intelligence, Allston, MA, USA(自然与人工智能研究所,马萨诸塞州阿利斯顿);Broad Institute of MIT and Harvard, Cambridge, MA, USA(MIT和哈佛大学Broad研究所);Harvard Data Science Initiative, Cambridge, MA, USA(哈佛大学数据科学倡议)
Ant Financial Services Group(蚂蚁金融服务集团);Georgia Institute of Technology(佐治亚理工学院)
We present, GeniePath, a scalable approach for learning adaptive receptive fields of neural networks defined on permutation invariant graph data. In GeniePath, we propose an adaptive path layer consists of two complementary functions designed for breadth and depth exploration respectively, where the former learns the importance of different sized neighborhoods, while the latter extracts and filters signals aggregated from neighbors of different hops away. Our method works in both transductive and inductive settings, and extensive experiments compared with competitive methods show that our appr…
Hebrew University(希伯来大学);Weizmann Institute of Science(魏茨曼科学研究所)
Several recent works have shown separation results between deep neural networks, and hypothesis classes with inferior approximation capacity such as shallow networks or kernel classes. On the other hand, the fact that deep networks can efficiently express a target function does not mean that this target function can be learned efficiently by deep neural networks. In this work we study the intricate connection between learnability and approximation capacity. We show that learnability with deep networks of a target function depends on the ability of simpler classes to approximate the target. Spe…
Absolute abstraction: a renormalisation group approach
SISSA - International School for Advanced Studies(国际先进研究学院);University of Tübingen(图宾根大学);Universitá di Trieste(特里埃斯特大学);The Abdus Salam International Centre for Theoretical Physics(阿布杜斯-萨拉姆国际理论物理中心)
CISPA Helmholtz Center for Information Security(CISPA亥姆霍兹信息安全中心)
The strong lottery ticket hypothesis has highlighted the potential for training deep neural networks by pruning, which has inspired interesting practical and theoretical insights into how neural networks can represent functions. For networks with ReLU activation functions, it has been proven that a target network with depth $L$ can be approximated by the subnetwork of a randomly initialized neural network that has double the target's depth $2L$ and is wider by a logarithmic factor. We show that a depth $L+1$ network is sufficient. This result indicates that we can expect to find lottery ticket…
DeepMind(深度思维);Stanford University(斯坦福大学);University of Cambridge(剑桥大学)
Graph Neural Networks (GNNs) are a powerful representational tool for solving problems on graph-structured inputs. In almost all cases so far, however, they have been applied to directly recovering a final solution from raw inputs, without explicit guidance on how to structure their problem-solving. Here, instead, we focus on learning in the space of algorithms: we train several state-of-the-art GNN architectures to imitate individual steps of classical graph algorithms, parallel (breadth-first search, Bellman-Ford) as well as sequential (Prim's algorithm). As graph algorithms usually rely on …
Neural inductive program synthesis is a task generating instructions that can produce desired outputs from given inputs. In this paper, we focus on the generation of a chunk of assembly code that can be executed to match a state change inside the CPU and RAM. We develop a neural program synthesis algorithm, AutoAssemblet, learned via self-learning reinforcement learning that explores the large code space efficiently. Policy networks and value networks are learned to reduce the breadth and depth of the Monte Carlo Tree Search, resulting in better synthesis performance. We also propose an effect…
Microsoft Research NYC(微软研究院纽约);UT Austin(得克萨斯大学奥斯汀分校);Google Research(谷歌研究院);UC Berkeley(加州大学伯克利分校);WPI(伍斯特理工学院)
We prove several hardness results for training depth-2 neural networks with the ReLU activation function; these networks are simply weighted sums (that may include negative coefficients) of ReLUs. Our goal is to output a depth-2 neural network that minimizes the square loss with respect to a given training set. We prove that this problem is NP-hard already for a network with a single ReLU. We also prove NP-hardness for outputting a weighted sum of $k$ ReLUs minimizing the squared error (for $k>1$) even in the realizable setting (i.e., when the labels are consistent with an unknown depth-2 ReLU…