✐‹creator "Kevin Kappelmann"› subsection ‹Group Syntax› theory HOL_Syntax_Bundles_Groups imports HOL.Groups begin bundle HOL_groups_syntax begin notation Groups.zero (‹0›) notation Groups.one (‹1›) notation Groups.plus (infixl ‹+› 65) notation Groups.minus (infixl ‹-› 65) notation Groups.uminus (‹(‹open_block notation=‹prefix -››- _)› [81] 80) notation Groups.times (infixl ‹*› 70) notation abs (‹¦_¦›) end end