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  • 标题:On defining the product r−k⋅∇lδ
  • 本地全文:下载
  • 作者:C. K. Li ; V. Zou
  • 期刊名称:International Journal of Mathematics and Mathematical Sciences
  • 印刷版ISSN:0161-1712
  • 电子版ISSN:1687-0425
  • 出版年度:2004
  • 卷号:2004
  • 期号:16
  • 页码:833-845
  • DOI:10.1155/S0161171204305193
  • 出版社:Hindawi Publishing Corporation
  • 摘要:

    Let ρ ( s ) be a fixed infinitely differentiable function defined on R + = [ 0 , ∞ ) having the properties: (i) ρ ( s ) ≥ 0 , (ii) ρ ( s ) = 0 for s ≥ 1 , and (iii) ∫ R m δ n ( x ) d x = 1 where δ n ( x ) = c m n m ρ ( n 2 r 2 ) and c m is the constant satisfying (iii). We overcome difficulties arising from computing ∇ l δ n and express this regular sequence by two mutual recursions and use a Java swing program to evaluate corresponding coefficients. Hence, we are able to imply the distributional product r − k ⋅ ∇ l δ for k = 1 , 2 , … and l = 0 , 1 , 2 , … with the help of Pizetti's formula and the normalization.

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