Keywords: 4-ary Boolean functions; matrix wec E1 E3.svg Walsh equivalence classes E1 <small> red </small> and E3 <small> green </small> of 4-ary Boolean functions<br> The functions are represented as red squares in a 256×256 matrix organized like a 16-cube Hasse diagram This is also a sec matrix Its rows show 256 8-ary Boolean functions of weight 64 <small>Red and green fields are both seen as ones here </small> Inkscape-hand a -Boolean Bin2svg own 2012 Mate2code 4-ary Boolean functions; matrix wec Sec matrices of Boolean functions |