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We model the behaviour of a relativistic spherically symmetric shearing fluid undergoing gravitational collapse with heat flux. It is demonstrated that the governing equation for the gravitational behaviour is a Riccati equation. We show that the Riccati equation admits two classes of new solutions in closed form. We regain particular models, obtained in(More)
This paper describes and evaluates a detector of presuppositions (DP) for survey questions. Incorrect presuppositions can make it difficult to answer a question correctly. Since they can be difficult to detect, DP is a useful tool for questionnaire designer. DP performs well using local characteristics of presuppositions. It reports the presupposition to(More)
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