# Nelson Elhage "Residual stream" term (Anthropic, 2021). Topic: [[Topics/LLMs/LLMs|LLMs]] · [[Topics/LLMs/Sources|Sources]] - Lead author of "A Mathematical Framework for Transformer Circuits" (Elhage, Nanda, Olsson and others, Anthropic, Dec 2021) ([transformer-circuits.pub](https://transformer-circuits.pub/2021/framework/index.html)). It treats each attention and MLP layer as reading from and writing to a shared **residual stream**. - The post uses that 2021 term as if it were part of the 2015 ResNet story.