On the Equation <i>n</i><sub>1</sub><i>n</i><sub>2</sub>=<i>n</i><sub>3</sub><i>n</i><sub>4</sub> Restricted to Factor Closed Sets

中国科学院数学与系统科学研究院期刊网

On the Equation n₁n₂=n₃n₄ Restricted to Factor Closed Sets

San Ying SHI, Michel WEBER

Acta Mathematica Sinica . 2018, (10): 1517 -1530 . DOI: 10.1007/s10114-018-7401-6