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concepts/symbolic-network.md
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title: "Symbolic Network (符号网络)"
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created: 2026-05-29
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updated: 2026-05-29
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type: concept
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tags: ["agent", "symbolic-learning", "analogy"]
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sources: ["https://arxiv.org/abs/2406.18532"]
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---
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# Symbolic Network (符号网络)
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**Symbolic Network** 是 [[agent-symbolic-learning|Agent Symbolic Learning]] 的核心抽象:将 Agent Pipeline 建模为可训练的"符号网络"——节点是处理步骤,prompts 和 tools 是"权重"。
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## 精确映射
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| 神经网络 | Symbolic Network |
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|:---|:---|
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| 计算图 | Agent Pipeline |
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| 层 (Layer) | 节点 (Node) |
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| 可学习权重 | Prompts + Tools(自然语言字符串 + 函数定义) |
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| 前向传播 | Agent 执行 |
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| 反向传播 | [[symbolic-backpropagation\|Symbolic BP]] |
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| 权重更新 | [[language-gradient\|Language Gradient]] → LLM 生成新内容 |
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## 为什么是"符号"
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- 优化对象是自然语言和代码,而非浮点数
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- "权重"可读、可编辑、可审计
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- 更新操作是 LLM 生成新文本,而非 `θ ← θ - η∇L`
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## 与后续工作的关系
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Symbolic Network 是更早期的底层抽象。[[skill-as-external-state|Skill as External State]](SkillOpt)和 [[heuristic-learning|Heuristic Learning]] 均可视为其具体实例。
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## 相关
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- [[agent-symbolic-learning]] — 完整框架
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- [[language-gradient]] — 符号网络的"梯度"
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