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From Isolated Conversations to Hierarchical Schemas: Dynamic Tree Memory Representation for LLMs

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arxiv 2410.14052 v3 pith:E7MGVEQV submitted 2024-10-17 cs.CL cs.AIcs.LG

classification cs.CLcs.AIcs.LG
keywords memorymemtreealgorithmdynamicembeddingsinformationmanagementrepresentation
verification ladder T0 review T1 audit T2 compute T3 formal
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Recent advancements in large language models have significantly improved their context windows, yet challenges in effective long-term memory management remain. We introduce MemTree, an algorithm that leverages a dynamic, tree-structured memory representation to optimize the organization, retrieval, and integration of information, akin to human cognitive schemas. MemTree organizes memory hierarchically, with each node encapsulating aggregated textual content, corresponding semantic embeddings, and varying abstraction levels across the tree's depths. Our algorithm dynamically adapts this memory structure by computing and comparing semantic embeddings of new and existing information to enrich the model's context-awareness. This approach allows MemTree to handle complex reasoning and extended interactions more effectively than traditional memory augmentation methods, which often rely on flat lookup tables. Evaluations on benchmarks for multi-turn dialogue understanding and document question answering show that MemTree significantly enhances performance in scenarios that demand structured memory management.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Collaborative Memory: Multi-User Memory Sharing in LLM Agents with Dynamic Access Control

    cs.MA 2025-05 conditional novelty 7.0 of 10

    A two-tier private/shared memory system with provenance-based access control reduces redundant queries in multi-user LLM agent teams by up to 61 percent without losing accuracy.

  2. TrajWiki: Source-Grounded Memory Trajectories for Long-Horizon Dialogue Agents

    cs.AI 2026-08 conditional novelty 6.0 of 10

    TrajWiki stores long-dialogue facts as evolving, source-linked claim histories organized into wiki pages, improving long-horizon QA on LoCoMo and MedMT-Bench in reported experiments.

  3. Experience-Evolving Multi-Turn Tool-Use Agent with Hybrid Episodic-Procedural Memory

    cs.LG 2025-12 conditional novelty 6.0 of 10

    An LLM agent that builds a tool-transition graph with state summaries from past experience improves tool selection and RL exploration by large margins on multi-turn benchmarks.

  4. Learn to Memorize: Optimizing LLM-based Agents with Adaptive Memory Framework

    cs.LG 2025-08 conditional novelty 5.0 of 10

    A learnable memory cycle with adaptive retrieval, merging, and storage, trained online, improves LLM agent accuracy on HotpotQA and MemDaily for most backbones.

  5. RGMem: Renormalization Group-inspired Memory Evolution for Language Agents

    cs.AI 2025-10 conditional novelty 4.0 of 10

    RGMem, a hierarchical memory framework with thresholded updates inspired by renormalization group ideas, reports state-of-the-art scores on the LOCOMO long-term conversational memory benchmark.

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