reserve a,b,p,k,l,m,n,s,h,i,j,t,i1,i2 for natural Number;

theorem
  i < j & i <> 0 implies i/j is not integer
proof
  assume that
A1: i < j and
A2: i <> 0;
  assume i/j is integer;
  then reconsider r = i/j as Integer;
  r = [\ r /]
    .= i qua Integer div j by INT_1:def 9;
  hence thesis by A1,A2,Th27,XCMPLX_1:50;
end;
