00283nam a2200121Ia 45000030006000000080041000060400015000471000017000622450035000792600018001145460012001320050017001440STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSaxena, H.C.  aCalculus of finite differences  bS.Chandc1961  aEnglish20220125170038.0