Title On a conjecture concerning total domination subdivision number in graphs Type of Research Article Keywords On a conjecture concerning total domination subdivision number in graphs Abstract On a conjecture concerning total domination subdivision number in graphs Researchers saeed kosari (First Researcher)، Zehui Shao (Second Researcher)، Rana Khoeilar (Third Researcher)، hossein karami (Fourth Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Fifth Researcher)، G. Hao (Not In First Six Researchers)