R.B. Adeniyi  , A.I.M. Aliyu  , 
    On the Tau Method for a Class of Non-Overdetermined Second Order Differential Equations,
    Research Journal of Applied Sciences,
    Volume 3,Issue 6,
    2008,
    Pages 438-446,
    ISSN 1815-932x,
    rjasci.2008.438.446,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2008.438.446)
    Abstract: This study is concerned with the Tau methods for initial value problems in the class of non-overdetermined second order ordinary differential equations. Three variants namely the differential, the integrated and the recursive formulation are considered. The corresponding error estimates for the 3 various are obtained and some selected examples are provided for illustration. The numerical evidences confirm the order of the Tau approximants so obtained for all the cases.
    Keywords: Tau method;differential;integrated;recursive;formulation;variant;canonical;polynomials;approximant;error;estimates