ftft Messages 21 Reaction score 0 Thread starter Mar 22, 2017 #1 In group theory, what is the direct product of a symmetry group with itself? Say T*T or O*O?
fresh_42 Staff Emeritus Science Advisor Homework Helper Insights Author 2025 Award Messages 20,819 Reaction score 28,467 Mar 22, 2017 #2 What do you accept as an answer? A split short exact sequence? And what are T and O?