20210206210800.0 2161-1203 American journal of computational mathematics (Print) American journal of computational mathematics. American journal of computational mathematics (Print) 2161-1203 http://www.scirp.org/journal/ajcm/ 2161-1203 2161-1203 2161-1203 American journal of computational mathematics. http://bibpurl.oclc.org/web/50120 California