
theorem Th35:
Sum digits(100,10) = 1
proof
  thus Sum digits(100,10) = Sum <%0,0%>+Sum <%1%> by Th34,AFINSQ_2:55
  .= (0 + 0) + Sum <%1%> by AFINSQ_2:54
  .= 1 by AFINSQ_2:53;
end;
