id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
596	Fail in low order ARMATACov (and ARMAACov)	Víctor de Buen Remiro	Víctor de Buen Remiro	"Function ARMATACov returns different values of first autocovariances for some low orders


  Polyn ARPol = 1-1.5*B+0.5625*B^2;
  Polyn MAPol = 1-0.624335218558454*B-0.08678995853253455*B^2+0.6681024625307754*B^3-0.5605871319845306*B^4+0.1937128035351634*B^5; 

  Set For(1,6,Matrix(Real k){
    Matrix m = ARMATACov(ARPol,MAPol,k);
    WriteLn(FormatMatrix(Tra(m)));
    m
  });


Returns these lines

11.12789038072332
11.12789038072332;10.09813430624192
11.12789038072332;10.09813430624192;9.240663647489591
3.763607141502552;3.130525976160094;2.931660474428523;2.942451345655835
6.546410972048287;5.802017653483999;5.373570835732404;5.102602819116959;4.240310981361478
6.546410972048287;5.802017653483999;5.373570835732404;5.102602819116959;4.240310981361478;3.683965189824091

Obviously first four lines are wrong"	defect	closed	highest		Math	head	major	fixed