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HARD.EKA
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1992-03-24
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310b
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12 lines
; Example of a nearly impossible problem.
; The true solution is: x1=1/3 x2=0 x3=1e-12
; but there are many "solutions" with small residuals.
x1^2 + 2*x2 - exp(x2) + x3 = 1e-12 - 8/9
x1*x2 + exp(-x2) + x1*x3 = 1 + 1e-12/3
x1^3 + cos(x2) - x3 = 1/27 - 1e-12 + 1
x1 := .5
x2 := 0
x3 := 0