MathGroup Archive 2001

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A SubListQ function?

  • To: mathgroup at
  • Subject: [mg28546] A SubListQ function?
  • From: AGUIRRE ESTIBALEZ Julian <mtpagesj at>
  • Date: Wed, 25 Apr 2001 19:21:53 -0400 (EDT)
  • Organization: Universidad del Pais Vasco/Euskal Herriko Unibertsitatea
  • Sender: owner-wri-mathgroup at

Given two lists a and b, how can I find if a is contained in b? I have

	Complement[a, b] == {}

	Intersection[a, b] == a


They work, but are not very efficient. Is there a better way?

Thanks in advance,

Julian Aguirre
Universidad del Pais Vasco

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