clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
(* Title: HOL/Library/Sum_of_Squares.thy
Author: Amine Chaieb, University of Cambridge
Author: Philipp Meyer, TU Muenchen
*)
section {* A decision procedure for universal multivariate real arithmetic
with addition, multiplication and ordering using semidefinite programming *}
theory Sum_of_Squares
imports Complex_Main
begin
ML_file "positivstellensatz.ML"
ML_file "Sum_of_Squares/sum_of_squares.ML"
ML_file "Sum_of_Squares/positivstellensatz_tools.ML"
ML_file "Sum_of_Squares/sos_wrapper.ML"
end