Two-level D- and A-optimal designs of Ehlich type with run sizes three more than a multiple of four

This article likely presents a research paper on experimental design, specifically focusing on D-optimal and A-optimal designs of the Ehlich type. The focus is on designs where the number of runs is three more than a multiple of four. The paper would likely delve into the mathematical properties and construction methods for these designs, potentially offering new insights or improvements over existing methods. The source being ArXiv suggests it's a pre-print or a published research paper.