Isomorphisms and Rigidity of Arithmetic Kac-Moody Groups

Key Points

• The research aims to address the isomorphism problem for certain Kac-Moody groups over rational numbers.
• Solved the isomorphism problem for specified subgroups.
• Established versions of strong rigidity and superrigidity.
• Focused on two-spherical split Kac-Moody groups.
• Provided solutions to the isomorphism problem for integral points of subgroups.
• Demonstrated strong rigidity and superrigidity in related Kac-Moody groups.