205 lines
8.0 KiB
Markdown
205 lines
8.0 KiB
Markdown
# LeJEPA 相关资源汇总
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> 通过互联网搜索整理,收录时间:2026-06-01
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---
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## 🎬 视频资源
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### 官方演示视频
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| 标题 | 链接 | 频道 | 时间 | 说明 |
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|------|------|------|------|------|
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| **world model video**(官方) | https://youtu.be/EioGDo67ZDs | AI and the Brain | 2026-05-09 | 论文官方配套视频,291次观看,由作者团队发布 |
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> 📌 该视频由 GitHub README 直接链接,是论文的官方配套演示视频。
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---
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## 📄 论文资源
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### 核心论文
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| 论文 | arXiv | 发表时间 | 说明 |
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|------|-------|----------|------|
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| **When Does LeJEPA Learn a World Model?** | [2605.26379](https://arxiv.org/abs/2605.26379) | 2026-05-25 | 本文,可识别性理论 |
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| **LeJEPA: Provable and Scalable Self-Supervised Learning Without the Heuristics** | [2511.08544](https://arxiv.org/abs/2511.08544) | 2025-11-11 | LeJEPA 原始论文,提出 SIGReg |
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| **LeWorldModel: Stable End-to-End JEPA from Pixels** | [2603.19312](https://arxiv.org/abs/2603.19312) | 2026-03-13 | LeJEPA 扩展到动作条件控制 |
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| **V-JEPA 2: Self-Supervised Video Models** | [2506.09985](https://arxiv.org/abs/2506.09985) | 2025 | Meta 的视频 JEPA,理解/预测/规划 |
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| **Causal-JEPA** | [2602.11389](https://arxiv.org/abs/2602.11389) | 2026 | 通过对象级干预学习世界模型 |
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### LeJEPA 原始论文摘要(arXiv:2511.08544)
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> Learning manipulable representations of the world and its dynamics is central to AI. Joint-Embedding Predictive Architectures (JEPAs) offer a promising blueprint, but lack of practical guidance and theory has led to ad-hoc R&D. We present a comprehensive theory of JEPAs and instantiate it in **LeJEPA**, a lean, scalable, and theoretically grounded training objective.
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>
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> **核心贡献:**
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> - 识别各向同性高斯分布为 JEPA 嵌入的最优分布
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> - 提出 SIGReg(Sketched Isotropic Gaussian Regularization)
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> - 单一超参数、线性时间/内存复杂度、无启发式技巧
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> - ~50 行代码实现,ViT-H/14 在 ImageNet-1k 达到 79%
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### LeWorldModel 摘要(arXiv:2603.19312)
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> LeWorldModel (LeWM) 是首个仅用两个损失项(下一嵌入预测 + 高斯正则化)从原始像素端到端稳定训练的 JEPA。
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>
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> **亮点:**
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> - ~15M 参数,单 GPU 数小时可训
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> - 规划速度比基础模型快 48 倍
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> - 潜空间编码有意义的物理结构
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> - 可可靠检测物理上不合理的事件
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---
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## 🌐 官方网站与代码
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### 项目主页
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- **官方网站:** https://klindtlab.github.io/lejepa-identifiability/
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- 包含完整摘要、定理说明、实验结果图表
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- 发布时间:2026-05-27
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### 代码仓库
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- **可识别性论文代码:** https://github.com/klindtlab/lejepa-identifiability
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- Lean 4 形式化证明(`lean/` 目录)
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- 实验代码(`experiments/` 目录)
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- 支持 2D、Scaling、Gennorm、Grid、Reacher 五类实验
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- **LeJEPA 原始代码:** https://github.com/rbalestr-lab/lejepa
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- GitHub Stars: 1,170+
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- 包含完整训练代码
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### 交互演示
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- **Google Colab Demo(~30秒,T4 GPU):**
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https://colab.research.google.com/drive/1ozjRk3FfUIDX7WBqlOKvhNcIamy0JxCH?usp=sharing
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---
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## 🤗 HuggingFace 资源
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### 论文页面
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- **可识别性论文:** https://huggingface.co/papers/2605.26379
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- AI 生成摘要:LeJEPA demonstrates linear identifiability of latent variables from nonlinear observations under Gaussian distributions, enabling reliable world modeling and planning.
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- **LeJEPA 原始论文:** https://huggingface.co/papers/2511.08544
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### 相关模型(基于 LeJEPA 训练)
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| 模型 | 说明 |
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|------|------|
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| [gajeshladhar/core-jepa](https://huggingface.co/gajeshladhar/core-jepa) | 图像特征提取,25次下载 |
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| [falafel-hockey/lejepa-vit-small-patch8-256-sentinel2-5band](https://huggingface.co/falafel-hockey/lejepa-vit-small-patch8-256-sentinel2-5band) | 遥感图像(Sentinel-2)特征提取 |
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| [adipanda/lejepa](https://huggingface.co/adipanda/lejepa) | LeJEPA 模型 |
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| [caiovicentino1/lejepa-v1-tinyimagenet](https://huggingface.co/caiovicentino1/lejepa-v1-tinyimagenet) | TinyImageNet 训练版本 |
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### 相关数据集
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| 数据集 | 说明 |
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|--------|------|
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| [falafel-hockey/sentinel2-lejepa-global-diverse-256](https://huggingface.co/datasets/falafel-hockey/sentinel2-lejepa-global-diverse-256) | Sentinel-2 遥感数据,5k 样本 |
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---
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## 📚 相关背景论文
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### JEPA 系列
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| 论文 | 说明 |
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|------|------|
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| LeCun, *A Path Towards Autonomous Machine Intelligence* (2022) | JEPA 原始提案 |
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| I-JEPA (Assran et al., CVPR 2023) | 图像 JEPA |
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| V-JEPA (Bardes et al., 2024) | 视频 JEPA |
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| V-JEPA 2 (Assran et al., 2025) | 视频理解/预测/规划 |
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### 可识别性理论背景
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| 论文 | 说明 |
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|------|------|
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| Hyvärinen & Pajunen (1999) | 非线性 ICA 不可识别性 |
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| Hyvärinen & Morioka (2016, 2017) | 时间对比学习 + 非线性 ICA |
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| Khemakhem et al. (2020) | VAE + 非线性 ICA 统一框架 |
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| Sprekeler et al. (2014) | SFA 非线性盲源分离理论 |
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| Sobal et al. (2022) | JEPA 关注慢特征 |
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### 自监督学习对比
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| 方法 | 论文 | 与 LeJEPA 关系 |
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|------|------|----------------|
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| VICReg | Bardes et al. (2021) | 二阶矩白化,理论上等价 |
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| InfoNCE | van den Oord et al. (2018) | 隐式高斯化,高维退化 |
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| BYOL | Grill et al. (2020) | stop-gradient,无理论保证 |
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| SimSiam | Chen & He (2021) | stop-gradient,无理论保证 |
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| DINO/DINOv3 | Caron et al. (2021) / 2025 | 自蒸馏 + 特征聚类 |
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---
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## 🔬 技术要点速查
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### LeJEPA 训练目标
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```
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L(h) = λ · L_SIG + (1-λ) · L_inv
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L_inv = E[‖h(z') - h(z)‖²] # 对齐损失(正样本对)
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L_SIG = SIGReg(h(z), N(0,I)) # 高斯正则化(防坍塌)
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```
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### SIGReg 实现原理
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- 通过随机投影(sketching)估计嵌入分布的特征函数
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- 与标准高斯的特征函数对比,计算偏差
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- 线性时间复杂度,~50 行代码
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### 关键超参数
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| 参数 | 推荐范围 | 说明 |
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|------|----------|------|
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| `λ`(正则化权重) | `1e-3` ~ `1e-2` | 太大→坍塌,太小→不可识别 |
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| `ρ`(OU 相关性) | `0.8` ~ `0.95` | 控制正样本对的相似度 |
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### 实验结果摘要
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| 维度 N | SIGReg R² | VICReg R² | InfoNCE R² |
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|--------|-----------|-----------|------------|
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| 2 | 0.999998 | 0.999996 | 0.950961 |
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| 64 | 0.999966 | 0.999968 | 0.648496 |
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| 256 | 0.999884 | 0.999889 | 0.696587 |
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| 1024 | 0.999561 | 0.999582 | 0.720241 |
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---
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## 📋 BibTeX 引用
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```bibtex
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@article{klindt2026lejepa,
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author = {Klindt, David and LeCun, Yann and Balestriero, Randall},
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title = {When Does LeJEPA Learn a World Model?},
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year = {2026},
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journal = {arXiv preprint arXiv:2605.26379},
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}
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@article{balestriero2025lejepa,
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author = {Balestriero, Randall and LeCun, Yann},
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title = {LeJEPA: Provable and Scalable Self-Supervised Learning Without the Heuristics},
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year = {2025},
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journal = {arXiv preprint arXiv:2511.08544},
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}
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@article{maes2026leworldmodel,
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author = {Maes, Lucas and Le Lidec, Quentin and Scieur, Damien and LeCun, Yann and Balestriero, Randall},
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title = {LeWorldModel: Stable End-to-End Joint-Embedding Predictive Architecture from Pixels},
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year = {2026},
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journal = {arXiv preprint arXiv:2603.19312},
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}
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```
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---
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## 🗺️ 资源地图
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```
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LeJEPA 生态系统
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├── 理论基础
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│ ├── arXiv:2511.08544 (LeJEPA 原始论文)
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│ └── arXiv:2605.26379 (可识别性理论,本文)
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├── 应用扩展
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│ ├── arXiv:2603.19312 (LeWorldModel,像素控制)
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│ └── arXiv:2602.11389 (Causal-JEPA,因果干预)
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├── 代码
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│ ├── github.com/rbalestr-lab/lejepa (LeJEPA 训练)
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│ └── github.com/klindtlab/lejepa-identifiability (可识别性实验)
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├── 演示
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│ ├── YouTube: youtu.be/EioGDo67ZDs (官方视频)
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│ ├── 官网: klindtlab.github.io/lejepa-identifiability
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│ └── Colab: 交互式 2D 演示
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└── 社区
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├── HuggingFace: huggingface.co/papers/2605.26379
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└── HuggingFace: huggingface.co/papers/2511.08544 (1170+ Stars)
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```
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