常微分方程是时间序列的先俢课，当然，对随机过程的帮助也很大。我把习题详解也一同附上，供大家自学。
Elementary Differential Equations and Boundary Value Problems
Editorial Reviews        Product Description  Written from the perspective of the applied mathematician, the latestedition of this bestselling book focuses on the theory and practicalapplications of Differential Equations to engineering and the sciences.Emphasis is placed on the methods of solution, analysis, andapproximation. Use of technology, illustrations, and problem sets helpreaders develop an intuitive understanding of the material. Historicalfootnotes trace the development of the discipline and identifyoutstanding individual contributions. This book builds the foundationfor anyone who needs to learn differential equations and then progressto more advanced studies.
  
      From the Publisher  Written from the perspective of the applied mathematician, the latestedition of this established textbook combines a solid exposition of theelementary theory of differential equations with substantialinformation on solution, analysis, and approximation techniques usefulin a wide range of applications. Features a vast number and diversityof problems (solved by pencil and paper or on the computer) whichprovide instructors with a multitude of choices in tailoring theircourse to meet their own goals and the needs of their students. --This text refers to an out of print or unavailable edition of this title.


链接已更正，见下面，免费《Elementary Differential Equations and Boundary Value Problems，课本+习题详解》。为表示歉意，附赠中文随机过程一套。