Your hands-on study guide to the inner world of the cell Need to get a handle on molecular and cell biology? Thiseasy-to-understand guide explains the structure and function of thecell and how recombinant DNA technology is changing the face ofscience and medicine. You discover how fundamental principles andconcepts relate to everyday life. Plus, you get plenty of studytips to improve your grades and score higher on exams! Explore the world of the cell — take a tour inside the structureand function of cells and see how viruses attack and destroythem Understand the stuff of life (molecules) — get up to speed on thestructure of atoms, types of bonds, carbohydrates, proteins, DNA,RNA, and lipids Watch as cells function and reproduce — see how cellscommunicate, obtain matter and energy, and copy themselves forgrowth, repair, and reproduction Make sense of genetics — learn how parental cells organize theirDNA during sexual reproduction and how scientists can predictinheritance

The updated new edition of the classic and comprehensive guideto the history of mathematics For more than forty years, A History of Mathematics has been thereference of choice for those looking to learn about thefascinating history of humankind’s relationship with numbers,shapes, and patterns. This revised edition features up-to-datecoverage of topics such as Fermat’s Last Theorem and the PoincaréConjecture, in addition to recent advances in areas such as finitegroup theory and computer-aided proofs. Distills thousands of years of mathematics into a single,approachable volume Covers mathematical discoveries, concepts, and thinkers, fromAncient Egypt to the present Includes up-to-date references and an extensive chronologicaltable of mathematical and general historical developments. Whether you're interested in the age of Plato and Aristotle orPoincaré and Hilbert, whether you want to know more about thePythagorean theorem or the golden mean, A History of Mathematics

Tips for simplifying tricky operations Get the skills you need to solve problems and equations and beready for algebra class Whether you're a student preparing to take algebra or a parentwho wants to brush up on basic math, this fun, friendly guide hasthe tools you need to get in gear. From positive, negative, andwhole numbers to fractions, decimals, and percents, you'll buildnecessary skills to tackle more advanced topics, such as imaginarynumbers, variables, and algebraic equations. * Understand fractions, decimals, and percents * Unravel algebra word problems * Grasp prime numbers, factors, and multiples * Work with graphs and measures * Solve single and multiple variable equations

本书的重点是基于向量场和一元二次函数的非线性动力学。本书从不同视角研究非线性动力学和二次动力系统的分岔。二维动力系统是非线性动力学中最简单的动力系统之一，但二维二次系统中平衡点和流的局部与全局结构有助于我们理解其他非线性动力系统，这也是解决希尔伯特第十六问题的关键一步。本书详细探论了二维二次系统可能存在的奇异动力学问题；介绍了二维系统中平衡态和一维流的动力学；讨论了鞍形汇和鞍形源分岔，给出了鞍形中心分岔；提出了无限平衡态是非线性系统的开关分岔；从第一类积分流形出发，发展了鞍焦点网络，并给出了鞍、源和汇网络。 本书可作为动力系统和控制专业的参考书，适合数学、机械和电气工程领域的研究人员、学生和工程师阅读参考。