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Sets (algebra of set operations (., ., ., ., ., ., ., ., ., ., .), set…

- - - - if A=B possibility is eliminated we called proper subset or proper superset
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      - notes that following are not logical. there are possible contradictions
- - - - Possibilities
        
        E = { vehicles parked at maharagama }
        
        E = { vehicles in Sri Lanka }
  - - - |A| = 5
  - - - { integers between 1 & 10 }
      - { vowels in English }
    - - { integers }
      - { real numbers between 1 & 2 }