@article{oai:ir.kagoshima-u.ac.jp:00014591,
 author = {ISOKAWA, Yukinao and HAMADA, Kazuya},
 journal = {鹿児島大学教育学部研究紀要. 自然科学編, Bulletin of the Faculty of Education, Kagoshima University. Natural science},
 month = {Mar},
 note = {A parent-child relationship for Pytagorean triplets are studied. This relationship introduces a directedgraph.First we present a characterization of root nodes of the graph. Next we show every offspring of a root node is an innite subgraph. Then we give a useful program which computes vertices and edges of the graph. Several simulations by using the program suggest that offspring is in fact a tree.},
 pages = {1--6},
 title = {Family Tree of Pythagorean Triplets : A Statistical Approach},
 volume = {710},
 year = {2019}
}