98.65.-r Galaxy groups, clusters, and superclusters; large scale structure of the Universe ( 0 Dok. )

• 98.65.At Interacting galaxies; galaxy pairs, and triples ( 0 Dok. )
• 98.65.Bv Small and compact galaxy groups ( 0 Dok. )
• 98.65.Cw Galaxy clusters ( 0 Dok. )
• 98.65.Dx Superclusters; large-scale structure of the universe (including voids, pancakes, great wall, etc.) ( 0 Dok. )
• 98.65.Fz Galaxy mergers, collisions, and tidal interactions ( 0 Dok. )
• 98.65.Hb Intracluster matter; cooling flows ( 0 Dok. )