Double lift small-time film "The Wonder of Magic", Dai Vernon said that he "may be the creator" of the double turnover, but wasn't certain. Double lift A double lift is a sleight of hand maneuver used by magicians in card magic. It is a method by which the identity of the top card may be kept secret by lifting the top two cards as one, making it seem as if only the top card is picked up. Similar techniques may be applied to more than two cards to perform a triple or even quadruple lift. The term was coined by Theo Annemann.
Quadruple-precision floating-point format the double-double technique above, although that technique does not implement IEEE quadruple precision), since direct hardware support for quadruple precision is, as of 2016, less common (see "Hardware support" below). One can use general arbitrary-precision arithmetic libraries to obtain quadruple (or higher) precision, but specialized quadruple-precision implementations may achieve higher performance. A separate question is the extent to which quadruple-precision types are directly incorporated into computer programming languages. Quadruple precision is specified in Fortran by the codice_2 (module codice_3 from Fortran 2008 must be used, the constant codice_4 is equal to 16 on most processors), or as codice_5, or in