In July 1922 Aleksandrov and Urysohn went to spend the summer at Bolshev, near to Moscow, where they began to study concepts in topology.
Sa Hulyo 1922 Aleksandrov at Urysohn napunta sa gastusin ng tag-init at Bolshev, malapit sa Moscow, kung saan sila nagsimula sa konsepto ng pag-aaral sa topology.