Lee, Hosoo; Choi, Keunbae A study on the existence of the solution in the isoperimetric problem. (English) Zbl 1461.51013 East Asian Math. J. 36, No. 2, 131-146 (2020). MSC: 51M04 PDFBibTeX XMLCite \textit{H. Lee} and \textit{K. Choi}, East Asian Math. J. 36, No. 2, 131--146 (2020; Zbl 1461.51013) Full Text: DOI
Choi, Keunbae A study on the theoretical background of the multiplication of rational numbers as composition of operators. (Korean. English summary) Zbl 1376.97002 East Asian Math. J. 33, No. 2, 199-216 (2017). MSC: 97F40 PDFBibTeX XMLCite \textit{K. Choi}, East Asian Math. J. 33, No. 2, 199--216 (2017; Zbl 1376.97002) Full Text: DOI
Lee, Jaun; Choi, Keunbae A study on the equiangular problem in the isoperimetric problem of polygons. (Korean. English summary) Zbl 1355.97012 East Asian Math. J. 31, No. 4, 445-458 (2015). MSC: 97G40 51M04 PDFBibTeX XMLCite \textit{J. Lee} and \textit{K. Choi}, East Asian Math. J. 31, No. 4, 445--458 (2015; Zbl 1355.97012) Full Text: DOI