Based on the sequences representation of Bent functions

this paper proves that when each line of the n-order Walsh-Hadamard matrix Hn is taken reverse and negative

it is still being a line of the former matrix.It also proves that any line of the even and odd items is a line of the n-1-order Walsh-Hadamard Matrix Hn-1.Secondly

this paper proposes three methods of constructing Bent sequences through two different concatenation by two existing bent sequences.Lastly

this paper proves that the sequences which ar...