20Jxx Connections with homological algebra and category theory ( 0 Dok. )

• 20J05 Homological methods in group theory ( 0 Dok. )
• 20J06 Cohomology of finite groups ( 0 Dok. )
• 20J10 Groups arising as cohomology groups ( 0 Dok. )
• 20J15 Category of groups ( 0 Dok. )
• 20J99 None of the above but in this section ( 0 Dok. )