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From the 1 of 5 linked papers with an AI index.

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5 papers

math.OC2026

Adaptive Gradient-Based Methods for a Broader Class of Optimization Problems under Performative Prediction

Hiroki Hamaguchi, Yuya Hikima, Hiroshi Sawada +1

The paper proposes a gradient-based optimization algorithm that estimates distribution shifts via finite differences, providing convergence guarantees for a wider range of loss fun…

cs.CG2026

Initial Placement for Fruchterman--Reingold Force Model With Coordinate Newton Direction

Hiroki Hamaguchi, Naoki Marumo, Akiko Takeda

The Fruchterman--Reingold (FR) force model is widely used in force-directed graph drawing, and multilevel approaches such as sfdp in Graphviz scale these methods effectively. A cru…

quant-ph2026

Bounded-depth spacetime lattice surgery for resource-efficient fault-tolerant quantum computation

Kou Hamada, Hiroki Hamaguchi, Yosuke Ueno +3

Fault-tolerant quantum computing based on lattice surgery requires place-and-route compilation with low spacetime overhead. Routing, in particular, faces a basic tension between su…

math.OC2026

Practical Regularized Quasi-Newton Methods with Inexact Function Values

Hiroki Hamaguchi, Naoki Marumo, Akiko Takeda

Many practical optimization problems involve objective function values that are corrupted by unavoidable numerical errors. In smooth nonconvex optimization, quasi-Newton methods co…

quant-ph2025

Faster computation of nonstabilizerness

Hiroki Hamaguchi, Kou Hamada, Naoki Marumo +1

The characterization of nonstabilizerness is fruitful due to its application in gate synthesis and classical simulation. In particular, the resource monotone called the stabilizer…