Childline show, suggested to the BBC that they create "Childwatch", a programme about child abuse that was screened on 30 October 1986 on BBC1, the aim being to try to detect children at risk before their lives were in danger. Viewers were asked if they would take part in the survey in an edition of "That's Life!". A helpline was opened after the programme so that any child currently suffering abuse could call for help. Rantzen, together with her BBC producers Sarah Caplin and Ritchie Cogan, therefore suggested they should create a helpline specifically for children in danger or distress, to
Well-founded relation sets are well-founded. A relation "R" is converse well-founded, upwards well-founded or Noetherian on "X", if the converse relation "R" is well-founded on "X". In this case "R" is also said to satisfy the ascending chain condition. In the context of rewriting systems, a Noetherian relation is also called terminating. An important reason that well-founded relations are interesting is because a version of transfinite induction can be used on them: if ("X", "R") is a well-founded relation, "P"("x") is some property of elements of "X", and we want to show that it suffices to show that: That is, Well-founded induction