Compressing Mappings on Primitive Sequences over Z/(2e) and Its Galois Extension

  • Authors:
  • Qi Wenfeng;Zhu Xuanyong

  • Affiliations:
  • Department of Applied Mathematics, Zhengzhou Information Engineering University, 1001-745, Zhengzhou, 450002, People's Republic of Chinaf1wenfeng.qi@263.netf1f2zhuxuanyong@263.netf2;Department of Applied Mathematics, Zhengzhou Information Engineering University, 1001-745, Zhengzhou, 450002, People's Republic of Chinaf1wenfeng.qi@263.netf1f2zhuxuanyong@263.netf2

  • Venue:
  • Finite Fields and Their Applications
  • Year:
  • 2002

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Abstract

Let f(x) be a strongly primitive polynomial of degree n over Z/(2^e), @h(x"0,x"1,...,x"e"-"2) a Boolean function of e-1 variables and @f(x"0,x"1,...,x"e"-"1)=x"e"-"1+@h(x"0,x"1,...,x"e"-"2)G (f(x),Z/(2^e)) denotes the set of all sequences over Z/(2^e) generated by f(x), F"2^~ the set of all sequences over the binary field F"2, then the compressing mapping @F : G(f(x),Z/(2^e))-F"2^~,a=a"0+a"12+...+a"e"-"12^e^-^1@?@f(a"0,a"1,...,a"e"-"1) mod 2 is injective, that is, for a,b@?G(f(x),Z/(2^e)), a=b if and only if @F(a)=@F(b), i.e., @f(a"0,...,a"e"-"1)=@f(b"0,...,b"e"-"1) mod 2. In the second part of the paper, we generalize the above result over the Galois rings.