Let A be a Coxeter arrangement of rank ℓ. In 1987 Orlik, Solomon and Terao conjectured that for every 1≤d≤ℓ, the first d exponents – when listed in increasing order are realized as free restriction to some intersection reflecting hyperplanes dimension d. This conjecture does follow from rather extensive case-by-case studies by Orlik 1992 1993, where they show all restrictions arrangements free....

Small and medium enterprises (SMEs) are vital for achieving sustainable development. However, it remains unclear whether engagement in international trade-oriented policies improves SMEs operations, particularly Africa, where concluded arrangements made to partake the African Continental Free Trade Agreement (AfCFTA). This study examined role of trade liberalization on performance Nigeria using...