The set or property of problems for which no algorithm at all exists. E.g. the Halting Problem. See also {provably difficult}.

In addition suitable contents:
[ = ] [ al ] [ algorithm ] [ alt ] [ am ] [ ar ] [ arc ] [ at ] [ b ] [ ch ] [ cu ] [ diff ] [ du ] [ E ] [ ee ] [ er ] [ et ] [ fi ] [ file ] [ fo ] [ for ] [ h ] [ hm ] [ hr ] [ id ] [ iff ] [ il ] [ in ] [ is ] [ it ] [ Lex ] [ ls ] [ lt ] [ ly ] [ mo ] [ mod ] [ module ] [ ms ] [ na ] [ ng ] [ no ] [ op ] [ pe ] [ ph ] [ pr ] [ provably difficult ] [ query ] [ rc ] [ re ] [ ro ] [ S ] [ se ] [ set ] [ so ] [ st ] [ T ] [ th ] [ va ]