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arXiv 2304.08596math.OC
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旋转矩阵上的隐藏凸性、优化与算法

Hidden convexity, optimization, and algorithms on rotation matrices

Akshay Ramachandran, Kevin Shu, Alex L. Wang

AI总结:

本文研究了旋转矩阵集合$\text{SO}(n)$上约束优化问题的隐藏凸性,证明了其二维像和严格上三角项投影的凸性,从而为单一约束或低秩矩阵约束问题构建了最优的精确凸重构。

摘要:

本文研究旋转矩阵集合$\text{SO}(n)$上约束优化问题相关的隐藏凸性。由于约束$X \in \text{SO}(n)$,此类问题是非凸的。尽管如此,我们证明了$\text{SO}(n)$的某些线性像是凸的,这为这些问题提供了具有可证明保证的凸优化算法的可能性。我们的主要技术贡献是证明了$\text{SO}(n)$的任何二维像都是凸的,并且$\text{SO}(n)$到其严格上三角项的投影是凸的。这些结果使我们能够为$\text{SO}(n)$上具有单一约束或由低秩矩阵定义约束的约束优化问题构建精确的凸重构。这两个结果在形式意义上都是最优的。

英文摘要:

This paper studies hidden convexity properties associated with constrained optimization problems over the set of rotation matrices $\text{SO}(n)$. Such problems are nonconvex due to the constraint $X \in \text{SO}(n)$. Nonetheless, we show that certain linear images of $\text{SO}(n)$ are convex, opening up the possibility for convex optimization algorithms with provable guarantees for these problems. Our main technical contributions show that any two-dimensional image of $\text{SO}(n)$ is convex and that the projection of $\text{SO}(n)$ onto its strict upper triangular entries is convex. These results allow us to construct exact convex reformulations for constrained optimization problems over $\text{SO}(n)$ with a single constraint or with constraints defined by low-rank matrices. Both of these results are optimal in a formal sense.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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