
theorem
for b being Nat st b > 1 holds digits(value(<%0%>,b),b)=<%0%>
proof
  let b be Nat;
  assume A1: b > 1;
  thus digits(value(<%0%>,b),b)=digits(0,b) by Th2
  .= <%0%> by A1,NUMERAL1:def 2;
end;
