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An old Hasidic rabbi asked his pupils how to tell when night ended and the morning began, which is the time for certain holy prayers.

  "Is it when you see an animal in the distance and know whether it's a shep of a dog?"  
  "No," the rabbi answered.  
  "Is it when you can look at a tree and tell whether it's a fig tree or a pear tree?"  
  "No," the rabbi answered again.  
  After a few more tries, the pupils said, "Then tell us, what is it?"  
  "It is when you can look on the face of any man or woman and know that they are your sister or brother. Until then, it is still night."  
     
  Hasidic Mondo  

Research

    General and Set Theoretic Topology  
       
 

Covering Properties

 
 

Topological Completeness

 
  Generalized Metric Spaces  
  Fibrewise Topology  
 

Ordered Spaces

 
  (Quasi-) Uniform Spaces  
  Lattice Topologies/Uniformities  
       
    Connections of General Topology with Functional Analysis  
       
  Topological Measure Theory  
 

Topological Vector Spaces