Title On Two Open Problems on Double Vertex-Edge Domination in Graphs Type of Research Article Keywords On Two Open Problems on Double Vertex-Edge Domination in Graphs Abstract On Two Open Problems on Double Vertex-Edge Domination in Graphs Researchers FANG MIAO (First Researcher)، WENJIE FAN (Second Researcher)، Mustapha Chellali (Third Researcher)، Rana Khoeilar (Fourth Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Fifth Researcher)، (Not In First Six Researchers)