let matita_conf = runtime_base_dir ^ "/matita.conf.xml"
let closed_xml = runtime_base_dir ^ "/closed.xml"
let gtkmathview_conf = runtime_base_dir ^ "/gtkmathview.matita.conf.xml"
let matita_conf = runtime_base_dir ^ "/matita.conf.xml"
let closed_xml = runtime_base_dir ^ "/closed.xml"
let gtkmathview_conf = runtime_base_dir ^ "/gtkmathview.matita.conf.xml"