要使我国的数学事业更好地发展起来，需要数学家淡泊名利并付出更艰苦地努力。另一方面，我们也要从客观上为数学家创造更有利的发展数学事业的外部环境，这主要是加强对数学事业的支持与投资力度，使数学家有较好的工作与生活条件，其中也包括改善与加强数学的出版工作。
　　从出版方面来讲，除了较好较快地出版我们自己的成果外，引进国外的先进出版物无疑也是十分重要与必不可少的。科学出版社影印一批他们出版的好的新书，使我国广大数学家能以较低的价格购买，特别是在边远地区工作的数学家能普遍见到这些书，无疑是对推动我国数学的科研与教学十分有益的事。
　　这次科学出版社购买了版权，一次影印了23本施普林格出版社出版的数学书，就是一件好事，也是值得继续做下去的事情。大体上分一下，这23本书中，包括基础数学书5本，应用数学书6本与计算数学书12本，其中有些书也具有交叉性质。这些书都是很新的，2000年以后出版的占绝大部分，共计16本，其余的也是1990年以后出版的。这些书可以使读者较快地了解数学某方面的前沿，例如基础数学中的数论、代数与拓扑三本，都是由该领域大数学家编著的“数学百科全书”的分册。对从事这方面研究的数学家了解该领域的前沿与全貌很有帮助。按照学科的特点，基础数学类的书以“经典”为主，应用和计算数学类的书以“前沿”为主。这些书的作者多数是国际知名的大数学家，例如《拓扑学》一书的作者诺维科夫是俄罗斯科学院的院士，曾获“菲尔兹奖”和“沃尔夫数学奖”。这些大数学家的著作无疑将会对我国的科研人员起到非常好的指导作用。

　　This book contains a mathematical exposition of analogies between classical (Hamiltonian) mechanics，geometrical optics，and hydrodynamics. This theory highlights several general mathematical ideas that appeared in Hamiltonian mechanics，optics and hydrodynamics under different names. In addition，some interesting applications of the general theory of vortices are discussed in the book such as applications in numerical methods，stability theory，and the theory of exact integration of equations of dynamics. The investigation of families of trajectories of Hamiltonian systems can be reduced to problems of multidimensional ideal fluid dynamics.For example，the well-known Hamilton-Jacobi method corresponds to the case of potential flows. The book will be of great interest to researchers and postgraduate students interested in mathematical physics，mechanics，and the theory of differential equations.

Introduction
Descartes， Leibnitz， and Newton
Newton and Bernoulli
Voltaire， Maupertuis， and Clairaut
Helmholtz and Thomson
About the Book

Chapter 1． Hydrodynamics， Geometric Optics， and Classical Mechanics
1． Vortex Motions of a Continuous Medium
2． Point Vortices on the Plane
3． Systems of Rays， Laws of Reflection and Refraction， and the Malus Theorem
4． Fermat Principle， Canonical Hamilton Equations， and the Optical-Mechanical Analogy
5． Hamiltonian Form of the Equations of Motion
6． Action in the Phase Space and the Poincare-Cartan Invariant
7． Hamilton-Jacobi Method and Huygens Principle
8． Hydrodynamics of Hamiltonian Systems
9． Lamb Equations and the Stability Problem

Chapter 2． General Vortex Theory
1． Lamb Equations and Hamilton Equations
2． Reduction to the Autonomous Case
3． Invariant Volume Forms
4． Vortex Manifolds
5． Euler Equation
6． Vortices in Dissipative Systems

Chapter 3． Geodesics on Lie Groups with a Left-Invariant Metric
1． Euter-Poincare Equations
2． Vortex Theory of the Top
3． Haar Measure
4． Poisson Brackets
5． Casimir Functions and Vortex Manifolds

Chapter 4． Vortex Method for Integrating Hamilton Equations
1． Hamilton-Jacobi Method and the Liouville Theorem on Complete Integrability
2． Noncommutative Integration of the Hamilton Equations
3． Vortex Integration Method
4． Complete Integrability of the Quotient System
5． Systems with Three Degrees of Freedom

Supplement 1： Vorticity Invariants and Secondary Hydrodynamics
Supplement 2： Quantum Mechanics and Hydrodynamics
Supplement 3： Vortex Theory of Adiabatic Equilibrium Processes
References
Index