Hadamard codes; Hadamard matrices; binary codes; linear codes;
4-linear code; Hadamard code; Hadamard matrix; additive code; extended perfect code; non
4-linear Hadamard codes; Additives; Binary codes; Error correction; Error correction codes; Hamming distance; Kernel; Linear code; Mathematics; Parity check codes; Vectors; Additive codes; Hadamard codes; Hadamard matrices; extended perfect codes; kernel; rank;