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      1 # Division Rules
      2 
      3 **Source:** Cryptography and Network Security
      4 
      5 **Chapter:** 2.1
      6 
      7 IMPORTANT RULES THAT MIGHT NOT BE OBVIOUS RIGHT AWAY:
      8 
      9 1. a | 1 then a = +- 1
     10 2. a | b and b | a then a = +- b
     11 3. Any b != 0 divides 0
     12 4. a | b and b | c then a | c
     13 5. b | g and b | h -> b | (mg + nh) for arbitrary integers m and n