• Differential Equations - Wikibooks, collection of open-content textbooks
  This book aims to lead the reader through the topic of differential equations, a vital area of modern mathematics and science. It is hoped that this book will provide information about the whole area of differential equations, but for the moment it will concentrate on the simpler equations.
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  in Educational > Mathematics > Ideas/Explanations/Wiki or Mathworld lookups with book collaborate collaborative differential educational equation math mathematics maths wiki wikibooks wikipedia.org
  Note: This stuff I found to be rather good: http://en.wikibooks.org/wiki/Differential_Equations/First_Order

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