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</head>
<body>
<div class="inner">
<header>
<span class="lab-name">Lee Optimization Group</span>
<button class="menu-toggle" aria-label="Menu">☰</button>
<nav>
<a href="index.html" class="active">Home</a>
<a href="research.html">Research</a>
<a href="publications.html">Publications</a>
<a href="group.html">Members</a>
<a href="hiring.html">Hiring</a>
<a href="contact.html">Contact</a>
</nav>
</header>
<main>
<img
src="lab_photo/lab_photo.jpg"
alt="Lee Optimization Group members together outdoors by a lake in autumn"
class="lab-photo"
/>
<p class="intro">
We pursue research in machine learning and optimization. To this end,
we develop theories and algorithms using computational and
mathematical tools. Our ultimate goal is to provide robust and
provable solutions to challenging problems in artificial intelligence,
particularly those in large-scale settings. We are passionate about
translating our findings into practical applications that can benefit
society. For further details on our research directions and ongoing
projects, please refer to the
<a href="research.html">Research</a>.
</p>
<h3>Recent News</h3>
<div class="news-list">
<div class="news-item">
<span class="news-date">Aug 2026</span>
<span class="news-content">🏛 We are co-organizing the <a href="https://let-workshop.github.io/2026/" target="_blank" rel="noopener">LeT Workshop</a> on October 7~8 at POSTECH. The workshop aims to bring together researchers interested in machine learning theory.</span>
</div>
<div class="news-item">
<span class="news-date">Aug 2026</span>
<span class="news-content">🎓 Our paper on extreme LLM sparsity has been accepted to EMNLP 2026. In this work, we show that carefully handling the elementary components of pruning can already substantially outperform existing pruning methods, even at extreme sparsity.</span>
</div>
<div class="news-item">
<span class="news-date">Aug 2026</span>
<span class="news-content">🎓 Our paper on semiconductor anomaly detection has been accepted to BMVC 2026. In this work, we introduce a semiconductor defect dataset (OASIS) along with vision-guided instruction tuning method.</span>
</div>
<div class="news-item">
<span class="news-date">Jul 2026</span>
<span class="news-content">🤝 Our lab has been selected for the 2026 NRF Next-Generation AI for Mathematics program.</span>
</div>
<div class="news-item">
<span class="news-date">Jul 2026</span>
<span class="news-content">🏆 Kwanhee received the IITP President’s Award in the Graduate Student Outstanding Research Achievement Competition at <a href="https://www.aiconnectkorea.kr/" target="_blank" rel="noopener">AI Connect Korea 2026</a>.</span>
</div>
<div class="news-item">
<span class="news-date">Jul 2026</span>
<span class="news-content">🏆 Our new paper on extreme LLM sparsity has received the Best Paper Award at CKAIA 2026. The preprint will be available on arXiv soon.</span>
</div>
<!-- <div class="news-item">
<span class="news-date">Apr 2026</span>
<span class="news-content"
>🎓 Our paper on uncertainty quantification in ICL has been
accepted to ACL 2026. In this work, we introduce self-function
vectors to directly decompose uncertainty, and propose a novel
framework to evaluate these disentangled sources.</span
>
</div> -->
<!--
<div class="news-item">
<span class="news-date">Feb 2026</span>
<span class="news-content"
>🤝 Our lab has been selected for the "Early-Career Researcher
Infrastructure Support Program" (NRF) — one of the most
competitive grants in Korea. With <em>500M KRW</em> in funding, we
will build a high-performance compute infrastructure to power our
research on extreme compression of hyperscale AI foundation
models.</span
>
</div>
-->
<!--
<div class="news-item">
<span class="news-date">Feb 2026</span>
<span class="news-content"
>📃 Our new paper is now available on
<a href="https://arxiv.org/abs/2602.18181v1" target="_blank"
>arXiv</a
>! In this work, We introduce SeedFlood, a decentralized LLM
training framework that enables model-size–independent
communication cost and perfect consensus.</span
>
</div>
-->
<!--
<div class="news-item">
<span class="news-date">Feb 2026</span>
<span class="news-content"
>📃 Our new paper is now available on
<a href="https://www.arxiv.org/abs/2602.03515" target="_blank"
>arXiv</a
>! In this work, we propose a basis rotation approach to
effectively address the gradient staleness problem in asynchronous
pipeline parallelism.</span
>
</div>
<div class="news-item">
<span class="news-date">Feb 2026</span>
<span class="news-content"
>✈️ Kwanhee started as a visiting student researcher in the
<a href="https://daslab.pages.ista.ac.at/" target="_blank"
>Dan Alistarh Group</a
>
at
<a href="https://ist.ac.at/en/home/" target="_blank">ISTA</a
>.</span
>
</div>
-->
</div>
<p class="news-note">If you want to see our earlier news, check out <a href="news.html">here</a>!</p>
<h3>Acknowledgements</h3>
<p class="ack">
Our research is generously supported by multiple organizations
including government agencies (NRF, IITP), industry (Google, Samsung,
Naver, Intel), and academic institutions (POSTECH, Yonsei).
</p>
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close.addEventListener("click", closeDrawer);
overlay.addEventListener("click", closeDrawer);
/* Keep Recent News in sync with news.html, which is the single source of
truth. The markup above is the no-JS fallback; this replaces it with the
newest 5 items whenever fetch works, so links added on the News page can
never go missing here. */
(function () {
var box = document.querySelector(".news-list");
if (!box || !window.fetch || !window.DOMParser) return;
fetch("news.html")
.then(function (r) {
return r.ok ? r.text() : Promise.reject();
})
.then(function (html) {
var doc = new DOMParser().parseFromString(html, "text/html");
var items = doc.querySelectorAll(".news-year .news-item");
var frag = document.createDocumentFragment();
Array.prototype.slice.call(items, 0, 5).forEach(function (item) {
var date = item.querySelector(".news-date");
var body = item.querySelector(".news-content");
if (!date || !body) return;
var row = document.createElement("div");
row.className = "news-item";
var d = document.createElement("span");
d.className = "news-date";
d.textContent = date.textContent.trim();
row.appendChild(d);
var c = document.createElement("span");
c.className = "news-content";
copyInto(body, c);
row.appendChild(c);
frag.appendChild(row);
});
if (frag.childNodes.length) {
box.textContent = "";
box.appendChild(frag);
}
})
.catch(function () {
/* leave the static fallback in place */
});
/* Copy text plus a whitelist of inline tags. Anything else contributes
only its text, so nothing executable is carried across. */
function copyInto(src, dest) {
Array.prototype.forEach.call(src.childNodes, function (node) {
if (node.nodeType === 3) {
dest.appendChild(document.createTextNode(node.nodeValue));
return;
}
if (node.nodeType !== 1) return;
var tag = node.tagName.toLowerCase();
if (tag === "a") {
var a = document.createElement("a");
var href = node.getAttribute("href") || "";
if (/^(https?:|\/|[\w.-]+\.html)/i.test(href)) a.setAttribute("href", href);
if (node.getAttribute("target")) a.setAttribute("target", node.getAttribute("target"));
if (node.getAttribute("rel")) a.setAttribute("rel", node.getAttribute("rel"));
copyInto(node, a);
dest.appendChild(a);
} else if (tag === "em" || tag === "strong") {
var el = document.createElement(tag);
copyInto(node, el);
dest.appendChild(el);
} else {
dest.appendChild(document.createTextNode(node.textContent));
}
});
}
})();
</script>
</body>
</html>