<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><DIV>Hi, everybody:</DIV>
<DIV> Now I am learning the IPOPT software, Now I have too questions. The first is:</DIV>
<DIV>1) for the HS0701 example which is included in the IPOPT software, the result is (1.000000,4.7429963,3.82114998,1.37940829),however,</DIV>
<DIV> if I set the starting point with values(1.000000,4.7429963,3.82114998,1.37940829), It still has 5 iterations. Is this normal?</DIV>
<DIV> The iteration information is as follows:</DIV>
<DIV>iter objective inf_pr inf_du lg(mu) ||d|| lg(rg) alpha_du alpha_pr ls</DIV>
<DIV> 0 1.7159545e+001 2.01e-002 5.20e-001 0.0 0.00e+000 - 0.00e+000 0.00e+000 0<BR> 1 1.7097682e+001 5.44e-004 4.08e-003 -1.8 1.22e-001 - 9.91e-001 1.00e+000h 1<BR> 2 1.7016042e+001 1.41e-003 1.09e-003 -3.1 1.26e-001 - 9.97e-001 1.00e+000f 1<BR> 3 1.7013987e+001 1.03e-004 1.71e-005 -5.1 2.92e-003 - 1.00e+000 1.00e+000h 1<BR> 4 1.7014017e+001 2.38e-008 1.35e-008 -11.0 3.70e-005 - 1.00e+000 1.00e+000h 1</DIV>
<DIV>Number of Iterations....: 4</DIV>
<DIV> </DIV>
<DIV> 2) The second question is that I want to know the difference of scaled an unscaled as below. sometimes the two methos have different objectives.</DIV>
<DIV><BR> (scaled) (unscaled)<BR>Objective...............: 1.7014017140224134e+001 1.7014017140224134e+001<BR>Dual infeasibility......: 2.2928101314633036e-014 2.2928101314633036e-014<BR>Constraint violation....: 2.1316282072803006e-014 2.1316282072803006e-014<BR>Complementarity.........: 1.0023967333275279e-011 1.0023967333275279e-011<BR>Overall NLP error.......: 1.0023967333275279e-011 1.0023967333275279e-011</DIV>
<DIV> </DIV>
<DIV>Thanks for the help!</DIV>
<DIV>yours:</DIV>
<DIV> Kaiyan Pan.</DIV>
<DIV> </DIV>
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