function Valid = checkIV(M)
  LiCols = licols(M);
  n=[]; %count how many times the Linear Independent Column is present in M
  Valid = 0; %booleqn representing zhether or not a Linear Independent Column is present only once
  for i=1:columns(LiCols)
    n(i)=0;
    for j=1:columns(M)
      if M(j)==LiCols(i)
        n(i)++;
      endif
    endfor
  endfor
  
  for z=1:columns(n)
    if n(i)==1
      Valid = 1;
    endif
  endfor
endfunction