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IsolatingInterval

IsolatingInterval[a]
gives a rational isolating interval for the algebraic number a.
IsolatingInterval[a, dx]
gives an isolating interval of width at most dx.
  • IsolatingInterval[a] gives an interval that does not contain any other root with the same minimal polynomial as a.
  • If a is complex, IsolatingInterval[a] gives a pair of Gaussian rationals defining an isolating rectangle in the complex plane.
EXAMPLESCLOSE ALL
Basic Examples   (2)
Find an isolating interval of :
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Out[1]=
 
Find an isolating interval of with width less than :
In[1]:=
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Out[1]=
Check that belongs to [a, b] and the width of [a, b] is less than :
In[2]:=
Click for copyable input
Out[2]=
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