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Cassinian curve (oval)

 
   
The locus of a point the product of whose distances from two fixed points is constant, a{TAG(tag=>sup)}2{TAG}.A lemniscate is the special case where the separation of the fixed points is 2a; in polar coordinates its equation is r {TAG(tag=>sup)}2{TAG} = 2a{TAG(tag=>sup)}2{TAG} cos 2θ. Named after Giovanni Domenico Cassini (1625-1712).  

 

 

 
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Cassini division
 
cassiterite (tinstone)
 
   

 

Other Terms : atom | roentgen | IUPAC

 

 

 
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