✐‹creator "Kevin Kappelmann"› section ‹HOL Syntax Bundles› subsection ‹Basic Syntax› theory HOL_Syntax_Bundles_Base imports HOL_Basics_Base begin bundle HOL_ascii_syntax begin notation (ASCII) Not (‹(‹open_block notation=‹prefix ~››~ _)› [40] 40) and conj (infixr ‹&› 35) and disj (infixr ‹|› 30) and implies (infixr ‹-->› 25) and not_equal (infixl ‹~=› 50) end end