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          Volume 7, Issue 3, Article 84 | 
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             On Error Bounds for Gauss-Legendre and Lobatto Quadrature Rules
 
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          Authors:  | 
          Szymon Wasowicz,  | 
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          Keywords: 
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          Convex functions of higher orders, Approximate integration, Quadrature rules. | 
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          Date Received: 
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          04/01/06 | 
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          Date Accepted: 
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          07/06/06 | 
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          Subject Codes: | 
           
             Pri: 41A55, 41A80 Sec: 26A51, 26D15. 
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          Editors:  | 
          Narendra K. Govil,   | 
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          Abstract: | 
           
              The error bounds for Gauss-Legendre and Lobatto quadratures are proved for
 four  times differentiable functions (instead of six times differentiable functions  as in the classical results). Auxiliarily we establish some inequalities for  3-convex functions.
             
          
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