Co2sobj_prop.thy
2013-05-22 chunhan Modify definitions of cpfd2sfds
2013-05-21 chunhan update
2013-05-21 chunhan fix bugs and proofs
2013-05-16 chunhan find bugs in deleted & inum_of_file
2013-05-15 chunhan finally get cf2sfile path property done
2013-05-15 chunhan remove duplicated pre-condition of current_files in OS_grant, since it is property if is_file/is_dir.
2013-05-09 chunhan fixed bugs in deleted definition
2013-05-08 chunhan update
2013-05-03 chunhan thy files
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