Title Signed mixed Roman domination numbers in graphs Type of Research Article Keywords Signed mixed Roman domination numbers in graphs Abstract Signed mixed Roman domination numbers in graphs Researchers Hossein Abdollahzadeh Ahangar (First Researcher)، L. Asgharsharghi (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، Lutz Volkmann (Fourth Researcher)