Relative termination tolerance
Type : Floating point number
Range : [1e-9,1e51]
Default : 1e-6
BARON terminates if \(L > ¥\) or \(U - L <= e | L |\), where \(L\) and \(U\) are the lower and upper bounds to the optimization problem at the current iteration, and \(e\) denotes the value of this option.
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