• closedAccess   Generating harmonic surfaces for interactive design 

      Arnal, A.; Monterde, Juan Elsevier (2014-06)
      A method is given for generating harmonic tensor product Bézier surfaces and the explicit expression of each point in the control net is provided as a linear combination of prescribed boundary control points. The matrix ...
    • openAccess   Hilbert series of modules over positively graded polynomial rings 

      Katthan, Lukas; Moyano-Fernández, Julio José; Uliczka, Jan Elsevier (2016-08)
      In this note, we give examples of formal power series satisfying certain conditions that cannot be realized as Hilbert series of finitely generated modules. This answers to the negative a question raised in a recent article ...