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nexus/wiki/concepts/Self-Referential-Computation.md
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---
title: "Self-Referential Computation"
type: concept
tags: []
---
## Definition
自引用计算是指系统的输出被用于修改系统自身结构的计算模式。在递归自我优化生成系统中,生成器的输出(优化后的提示词/程序)被元生成算子 $M$ 用来更新生成器本身,形成闭环。
## Expression
在 λ-calculus 中的表达:
单步更新函数:
$$\text{STEP} \equiv \lambda G.\; (M\;G)\big((O\;(G\;I));\Omega\big)$$
不动点组合子Y-Combinator
$$Y \equiv \lambda f.(\lambda x.f(x,x))(\lambda x.f(x,x))$$
稳定生成器:
$$G^* \equiv Y\;\text{STEP}$$
满足自引用不动点方程:
$$G^* = \text{STEP}\;G^*$$
## Key Insight
生成器被定义为"使用自身输出的函数"的不动点。这意味着生成器的输出已经编码了改进生成器所需的全部信息——无需外部干预,系统即可自我完善。
## Sources
- [[a-formalization-of-recursive-self-optimizing-generative-systems]]
## Connections
- [[Y-Combinator]] ← implements ← [[Self-Referential Computation]]
- [[Generator Space]] ← domain_of ← [[Self-Referential Computation]]
- [[Fixed-Point Semantics]] ← provides_semantics ← [[Self-Referential Computation]]