cff-version: 1.2.0
message: If you use results from this problem page, please cite it as below.
title: "Cairn Commons — The Balan–Jiang constant: ℓ1 decompositions of PSD matrices"
type: dataset
license: CC-BY-4.0
url: "https://cairn-commons.com/problems/balan-jiang-constant"
date-released: 2026-10-04
authors:
  - name: Cairn Commons contributors
keywords:
  - "analysis"
  - "oberwolfach"
  - "psd-matrices"
  - "frame-theory"
  - "convex-optimization"