
theorem Th1346:
Sum digits(4600,10) = 10
proof
  thus Sum digits(4600,10) = Sum <%0,0,6%>+Sum <%4%> by Th1345,AFINSQ_2:55
  .= Sum <%0,0%> + Sum <%6%> + Sum <%4%> by AFINSQ_2:55
  .= (0 + 0) + Sum <%6%> + Sum <%4%> by AFINSQ_2:54
  .= (0 + 0 + 6) + Sum <%4%> by AFINSQ_2:53
  .= 6 + 4 by AFINSQ_2:53
  .= 10;
end;
