GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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  3 The colors in the IntPic package
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  The idea in what concerns the colors is the following: the reader is free to
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  choose  his  colors  (taking  into  account that the latex xcolor package is
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  used),  but  we  try  to  make  users life reasonably easy. He is allowed to
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  choose tones. The default colors used by IntPic are not many, although (from
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  our experience) sufficient for most examples.
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  3.1 Colors by tones
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  The colors are divided by tones.
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    red  
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    gap> IP_ColorsRedTones; #red
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    [ "red", "red!50", "red!20", "red!80!green!50", "red!80!blue!60" ]
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    green  
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    gap> IP_ColorsGreenTones; #green
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    [ "green", "green!50", "green!20", "green!80!red!50", "green!80!blue!60" ]
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    blue  
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    gap> IP_ColorsBlueTones; #blue
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    [ "blue", "blue!50", "blue!20", "blue!80!red!50", "blue!80!green!60" ]
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    cyan  
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    gap> IP_ColorsCompRedTones; # cyan (complement of red)
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    [ "-red", "-red!50", "-red!20", "-red!80!green!50", "-red!80!blue!60" ]
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    magenta  
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    gap> IP_ColorsCompGreenTones; # magenta (complement of green)
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    [ "-green", "-green!50", "-green!20", "-green!80!red!50", "-green!80!blue!60" 
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     ]
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    yellow  
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    gap> IP_ColorsCompBlueTones; # yellow (complement of blue)
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    [ "-blue", "-blue!50", "-blue!20", "-blue!80!red!50", "-blue!80!green!60" ]
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    dark gray  
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    gap> IP_ColorsDGrayTones; # dark gray
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    [ "black!80", "black!70", "black!60", "black!50", "black!40" ]
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    light gray  
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    gap> IP_ColorsLGrayTones; # light gray
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    [ "black!30", "black!25", "black!20", "black!15", "black!10" ]
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  3.2 Lists of colors
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    array of colors by tones  
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    gap> ListsOfIP_Colors;
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    [ [ "red", "red!50", "red!20", "red!80!green!50", "red!80!blue!60" ], 
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      [ "green", "green!50", "green!20", "green!80!red!50", "green!80!blue!60" ], 
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      [ "blue", "blue!50", "blue!20", "blue!80!red!50", "blue!80!green!60" ], 
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      [ "-red", "-red!50", "-red!20", "-red!80!green!50", "-red!80!blue!60" ], 
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      [ "-green", "-green!50", "-green!20", "-green!80!red!50", 
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          "-green!80!blue!60" ], 
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      [ "-blue", "-blue!50", "-blue!20", "-blue!80!red!50", "-blue!80!green!60" ],
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      [ "black!80", "black!70", "black!60", "black!50", "black!40" ], 
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      [ "black!30", "black!25", "black!20", "black!15", "black!10" ] ]
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    list of colors by tones  
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    gap> IP_Colors;
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    [ "red", "red!50", "red!20", "red!80!green!50", "red!80!blue!60", "green", 
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      "green!50", "green!20", "green!80!red!50", "green!80!blue!60", "blue", 
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      "blue!50", "blue!20", "blue!80!red!50", "blue!80!green!60", "-red", 
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      "-red!50", "-red!20", "-red!80!green!50", "-red!80!blue!60", "-green", 
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      "-green!50", "-green!20", "-green!80!red!50", "-green!80!blue!60", "-blue", 
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      "-blue!50", "-blue!20", "-blue!80!red!50", "-blue!80!green!60", "black!80", 
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      "black!70", "black!60", "black!50", "black!40", "black!30", "black!25", 
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      "black!20", "black!15", "black!10" ]
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  3.3 The IntPic default list of colors
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  The  colors  are  shuffled  by  concatenating  the  transposed of the matrix
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  ListsOfIP_Colors. The list obtained is taken as the default list of colors.
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    default list of colors  
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    gap> ShuffledIP_colors;
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    [ "red", "green", "blue", "-red", "-green", "-blue", "black!80", "black!30", 
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      "red!50", "green!50", "blue!50", "-red!50", "-green!50", "-blue!50", 
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      "black!70", "black!25", "red!20", "green!20", "blue!20", "-red!20", 
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      "-green!20", "-blue!20", "black!60", "black!20", "red!80!green!50", 
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      "green!80!red!50", "blue!80!red!50", "-red!80!green!50", "-green!80!red!50",
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      "-blue!80!red!50", "black!50", "black!15", "red!80!blue!60", 
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      "green!80!blue!60", "blue!80!green!60", "-red!80!blue!60", 
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      "-green!80!blue!60", "-blue!80!green!60", "black!40", "black!10" ]
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  These  are the IntPic default colors. Although the user is free to use other
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  colors,  we  warn that there is a need of compatibility with the colors used
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  in  other  packages  (the  LaTeX  xcolor,  for  instance).  To emphasize the
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  integers  of  some  sets  by using some of the colors in some list of colors
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  (for  instance  the default colors) one may use empty lists to force the non
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  usage  of the colors whose order in the list of colors is the order of these
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  empty lists in the array of integers to be emphasized.
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    Example  
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    gap> m3 := Filtered([1..40],i->i mod 3=0);
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    [ 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39 ]
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    gap> m5 := Filtered([1..40],i->i mod 5=0);
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    [ 5, 10, 15, 20, 25, 30, 35, 40 ]
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    gap> m7 := Filtered([1..40],i->i mod 7=0);
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    [ 7, 14, 21, 28, 35 ]
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    gap> 
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    gap> arr := [[],[],m3,[],m5,[],m7];;
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    gap> tkz:=IP_TikzArrayOfIntegers([1..40],10,rec(highlights:=arr));;
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  3.4 Functions to deal with colors
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  For  the  moment  we  only  provide one function, which shuffles colors from
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  lists of colors.
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  3.4-1 Shuffle colors from lists of colors
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  ShuffleIP_Colors( mat )  function
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  The argument mat is a list of lists of colors of the same length. The output
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  is obtained by concatenating the transposed of mat.
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    Example  
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    gap> ShuffleIP_Colors([IP_ColorsRedTones,IP_ColorsCompBlueTones]);
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    [ "red", "-blue", "red!50", "-blue!50", "red!20", "-blue!20", 
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      "red!80!green!50", "-blue!80!red!50", "red!80!blue!60", "-blue!80!green!60" 
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     ]
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