List price: $17.00 (that's 30% off!)
What a heart warming message for children! The beautiful illustrations add to the magic touch of this enchanting children's book. I would recommend it as a gift for an early reader (up to age 8), or as a story to tell to a smaller child (age 2 to 5).*****
This is a delightful book that reader and listener will both enjoy.
List price: $24.95 (that's 50% off!)
The focus of the story is not on homoerotic love between two women, but on a person who is born female but feels herself to be male inside, and decides to act out that feeling by dressing and living as a man. An important difference between this story and the Streisand movie is that in the story, Yentl keeps living as a man in the end, saying that "I must remain as I am."
I thought the story was very good in how it dealt with the subject in a very open way. That was surprising for something that was written over 30 years ago.
Despite all these hurdles, it is possible to write quality stories and this collection is an existence proof of how well it can be done. Independent of the length, these are some of the best science fiction stories of all time. They range from puns to the possibilities of interstellar war. I started the book and kept it close so that I could read it during every spare moment. It is one of the best collections of science fiction stories that I have ever read.
First, the structure of the book is unique- most introductory algebra books tend to cover groups, rings, and fields in that order. More mathematically mature students, though, can gain a greater appreciation for rings by first understanding modules. Most texts tend to introduce rings first, because the classic examples of rings are easy to understand, and then generalize to modules. Isaacs instead builds upon the composition structures of groups to introduce the topic of X-groups (this is the only introductory graduate text that covers this extensively), so that modules and rings are not only presented at the same time, but in such a way that the reader can see the interplay between the two. This presentation also makes it easier to discuss the Jacobson radical and by the time the Wedderburn-Artin theorems are presented, the reader is familiar enough with the necessary elements of the proof that it actually becomes easy.
Another reason this book is good is because Isaacs includes difficult topics not generally covered in an introductory text, but in a way that they seem to be just a simple extension of the more basic material. For example, at the end of the noncommutative section (the first half of the book), Isaacs proves the algebraic foundation of character theory using the Wedderburn-Artin theorems, showing the module presentation of a representation as well as the classic homomorphism presentation. He then proves the basic results about characters, giving a very powerful tool to analyze the structure of a group.
In a more applied vein, Isaacs proves the steps used in the Berlekamp algorithm in the finite fields chapter, which not only allows the reader to gain experience using the generalized Chinese Remainder Theorem but also to apply it to the study of fields. After covering integrality, Isaacs explains the role of rational integers in character theory and applies it to prove Burnside's celebrated solvability proof, whose statement about groups seems to have nothing to do with integrality, or even noetherian rings for that matter.
While Isaacs covers other advanced topics (for example, Transfer theory in the study of groups, or the Schraier-Artin theorem), the text is excellent because he proves the basic results so clearly. While he doesn't talk about the geometric significance of groups that much, he does talk about groups from a stabilizer-orbit perspective that makes further study of symmetries a lot easier.
The proofs of the Fundamental Theorem of Galois Theory, Galois' proof of solvability, the Principal Ideal Theorem, and a stronger form of Sylow's theorem are particularly elegant, along with the chapter on solvable and nilpotent groups. What makes the book far superior to others, though, is the problems. If you can understand the hard proofs of this book, you should be able to do the problems in easier books (Dummit and Foote, Hungerford) pretty easily. Be warned- the problems are not there to have you "fill in the details" Isaacs left out (because his proofs generally don't leave even minute details out) or to get practice, but to actually prove new results. For example, important topics such as metabelian groups, supersolvability, and the structure of a field with an abelian Galois group are presented as problems.
In sum, anyone who wants to appreciate the beauty of algebra and understand more than just the basic concepts should learn it from Isaacs' book. While it is self-contained, one may want to study Herstein's book first and do some problems so that this book doesn't seem as intimidating. After studying this, you should be prepared to answer any basic algebra question on any prelim exam in the country and be sufficiently prepared to tackle more advanced branches of algebra.
The collection is well-suited to anyone with an interest in physics or a teacher who wants to introduce the fundamentals of a point without yet delving into the rigor that requires detailed formulas. As always, Asimov has written with a clarity that textbook authors are either unwilling or unable to achieve.
In my many experiences as an educator, I am often asked for "simple" references about various topics. When the topic is science, I always recommend the writings of Asimov and when the topic is physics, this is the first book I suggest.
It is a good collection of essays. It gives some good commentary about the field by one of its Grand Masters.
Nice book.
Noah noticed one lonely bird sitting in a tree. Noah asked the small, white dove why he did not boast. The Dove replied that he believed that everyone has something special, that another doesn't. Though, all are equally created by God.
Noah took all of the animals on the ark, but when he needed a 'messenger' to see if the waters were going down, the one he chose was the dove. The dove is a bird of humility and peace.
I believe that this story is good for those of all ages. It teaches a lesson to all; we are all equally created. People should remain humble.
It is excellently written and has amazing illustrations. I recommend this story to all. It is definitely worth reading.