--- title: "Kaifeng Lyu · Tsinghua University — author profile and papers" description: "Kaifeng Lyu, Tsinghua University: 3 papers on Elamur Research (2024), h-index 6 — affiliations, topics, co-authors and who cites them in our library." canonical: "https://research.elamur.ai/free/en/authors/kaifeng-lyu/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/kaifeng-lyu/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Kaifeng Lyu # Kaifeng Lyu Kaifeng Lyu has 3 papers in our library, in 2024, most of them on [Information retrieval & search](https://md.research.elamur.ai/free/en/topics/information-retrieval/), [Bias, fairness & safety](https://md.research.elamur.ai/free/en/topics/bias-fairness-safety/); often with [Anirudh Goyal](https://md.research.elamur.ai/free/en/authors/anirudh-goyal/), [Ashwinee Panda](https://md.research.elamur.ai/free/en/authors/ashwinee-panda/), [Jiatong Yu](https://md.research.elamur.ai/free/en/authors/jiatong-yu/). 3 papers in our library · 2024 [OpenAlex](https://openalex.org/A5030891201) · [**h-index 6**](https://openalex.org/authors/A5030891201) · [27 works](https://openalex.org/works?filter=author.id:A5030891201) · [253 citations](https://openalex.org/works?filter=author.id:A5030891201&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 3 works in our library](https://md.research.elamur.ai/free/en/authors/kaifeng-lyu/#papers) · [🔗 Cited 133 times in our library](https://md.research.elamur.ai/free/en/authors/kaifeng-lyu/cited-by/) · [1 more in our library without a page yet](#also) · [⭐ Paper Stars ranking: #7678](https://md.research.elamur.ai/free/en/paper-stars/page/77/#star-7678) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Kaifeng+Lyu) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Kaifeng+Lyu) · [dblp](https://dblp.org/search?q=Kaifeng+Lyu) · [ACL Anthology](https://aclanthology.org/search/?q=Kaifeng+Lyu) ## Affiliations [🎓**Tsinghua University** Beijing · China 2018–2026 · 7 papers*current*](https://md.research.elamur.ai/free/en/universities/tsinghua-university/) · [🎓**Princeton University** Princeton · United States 2021–2024 · 10 papers](https://md.research.elamur.ai/free/en/universities/princeton-university/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 2 more institutions on single bylines are not listed. ## Fields, topics and concepts Of its works in our library, with the number of works on each. 📚 Shelves 7 The field of science this work belongs to (OpenAlex fields).[Arts and Humanities · 3 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · [Computer Science · 3 works](https://md.research.elamur.ai/free/en/shelves/computer-science/) · [Artificial Intelligence · 3 works](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · [Language and Linguistics · 3 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) · [Safety Research · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/safety-research/) · [Social Sciences · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/) · [Information Systems · 1 work](https://md.research.elamur.ai/free/en/shelves/computer-science/information-systems/) 🧭 Topics 2 Research subjects and languages the work is about.[Bias, fairness & safety · 1 work](https://md.research.elamur.ai/free/en/topics/bias-fairness-safety/) · [Information retrieval & search · 1 work](https://md.research.elamur.ai/free/en/topics/information-retrieval/) ## Works by year ### 2020s [**2024** 3 papers](https://md.research.elamur.ai/free/en/authors/kaifeng-lyu/year/2024/) ## Papers The most cited first (OpenAlex and our library). 1. **[Safety Alignment Should Be Made More Than Just a Few Tokens Deep](https://md.research.elamur.ai/free/en/papers/qi-2024-safety-alignment-should-made-more/)** *(2024 · 97 citations)* The paper asks why safety-aligned LLMs are so easy to break, whether through adversarial suffixes, prefilling, tweaked decoding parameters, or a few steps of fine-tuning. 2. **[AI-Assisted Generation of Difficult Math Questions](https://md.research.elamur.ai/free/en/papers/shah-2024-ai-assisted-generation-difficult-math/)** *(2024 · 23 citations)* LLM training now treats mathematical reasoning as a core capability, but public sources of hard problems are largely used up. 3. **[RNNs are not Transformers (Yet): The Key Bottleneck on In-context Retrieval](https://md.research.elamur.ai/free/en/papers/wen-2024-rnns-transformers-yet-key-bottleneck/)** *(2024 · 17 citations)* The paper asks whether memory-efficient recurrent models such as Mamba, RWKV and Linear Transformers can match the expressive power of softmax-attention Transformers on algorithmic tasks, particularly when both use Chain-of-Thought (CoT). ## All works 4 works of theirs in our library, the most cited first; 3 with a page here, the others link their original until we summarise them. 1. [**Safety Alignment Should Be Made More Than Just a Few Tokens Deep arXiv:2406.05946**Xiangyu Qi, Ashwinee Panda, Kaifeng Lyu, et al.*2024 · 97 citations*](https://md.research.elamur.ai/free/en/papers/qi-2024-safety-alignment-should-made-more/) 2. [**AI-Assisted Generation of Difficult Math Questions arXiv:2407.21009**Vedant Shah, Dingli Yu, Kaifeng Lyu, et al.*2024 · 23 citations*](https://md.research.elamur.ai/free/en/papers/shah-2024-ai-assisted-generation-difficult-math/) 3. [**RNNs are not Transformers (Yet): The Key Bottleneck on In-context Retrieval arXiv:2402.18510**Kaiyue Wen, Xingyu Dang, Kaifeng Lyu*2024 · 17 citations*](https://md.research.elamur.ai/free/en/papers/wen-2024-rnns-transformers-yet-key-bottleneck/) 4. **[Fantastic Pretraining Optimizers and Where to Find Them II: Hyperball Optimization ↗](https://arxiv.org/abs/2606.16899) arXiv (Cornell University) · no summary yet**Kaiyue Wen et al.*2026 · 2 citations* ## Co-authors here 12 of 14 co-authors with a page, the most papers together first. - [Anirudh Goyal](https://md.research.elamur.ai/free/en/authors/anirudh-goyal/) - [Ashwinee Panda](https://md.research.elamur.ai/free/en/authors/ashwinee-panda/) - [Jiatong Yu](https://md.research.elamur.ai/free/en/authors/jiatong-yu/) - [Kaiyue Wen](https://md.research.elamur.ai/free/en/authors/kaiyue-wen/) - [Michael C. Mozer](https://md.research.elamur.ai/free/en/authors/michael-c-mozer/) - [Nan Rosemary Ke](https://md.research.elamur.ai/free/en/authors/nan-rosemary-ke/) - [Peter Henderson](https://md.research.elamur.ai/free/en/authors/peter-henderson/) - [Prateek Mittal](https://md.research.elamur.ai/free/en/authors/prateek-mittal/) - [Sanjeev Arora](https://md.research.elamur.ai/free/en/authors/sanjeev-arora/) - [Vedant Shah](https://md.research.elamur.ai/free/en/authors/vedant-shah/) - [Xiangyu Qi](https://md.research.elamur.ai/free/en/authors/xiangyu-qi/) - [Xiao Ma](https://md.research.elamur.ai/free/en/authors/xiao-ma/) ## Cited by Papers of our library cite their works 133 times (of the 149,439 papers whose bibliographies we read); [44 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/kaifeng-lyu/cited-by/). Updated 3 November 2026