Showing posts with label educational. Show all posts
Showing posts with label educational. Show all posts

Negative Math: How Mathematical Rules Can Be Positively Bent Review

Negative Math: How Mathematical Rules Can Be Positively Bent
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Negative Math: How Mathematical Rules Can Be Positively Bent ReviewThis book was quite hard to review. There are parts I found extremely interesting, and other parts I thought were full of sloppy thinking and misleading analogies. But overall, I think it is a worthwhile book to read. I think it is appropriate to divide the book into four separate sections, each of which deserves to be reviewed separately.
The first part is an attempt to show that some of the rules of algebra (particularly the rules for manipulating signs) are really counter-intuitive, and also an attempt to gain the perspective of an elementary algebra student who cannot understand why the rules are what they are. It is this part that I think is the worst part of the book, and in his attempts to show that the rules are counter-intuitive, all he manages to do is show that _his_ intuition works quite differently from _my_ intuition. This part is the section in which I found the sloppy thinking and resort to false analogy which I mentioned earlier. It seemed to me that there were things the author just didn't understand, but as I read further in the book, I found that he actually understood them even though he didn't seem to at first. This section would get three stars if I felt generous, or even two, if I were to review it alone.
The second part (actually intermixed with the first in its location in the book) describes the difficulties that mathematicians (even great ones) had in comprehending the concept of negative and imaginary numbers, and as such it provides some historical background for the rest of the book, which justifies its inclusion. If I were to review this part by itself, it would get three stars, meaning "it's OK," but it hardly justifies the book.
The best part of the book is the third. This is a very interesting attempt to come up with an algebra that differs from the usual, where he has to maintain consistency, and so he looks deeply into questions as to what further modifications to traditional algebra have to be made to go along with a postulated change. Much like the introduction of non-Euclidean geometry, the process leads to an odd-looking algebra, but one which fits together, and it is this part that I liked well enough to rate as five-star, bringing the overall rating for the book to four. This part made the book worthwhile for me.
Finally, the author ends with one very long chapter that probably summarizes what _he_ wants the book to be, though the previous section is what _I_ want of the book. He advocates a concept of a mathematics that would be suited to explaining problems of physics in a more natural manner, even if it might look different from traditional mathematics. I would have been happier if this part were shorter, though I think the author himself probably considered this part to be the major thesis of the book and this is why he devoted so much of the book to this part. This part is actually interesting enough that I'd rate it 4 stars, though as I said I'd prefer it more streamlined.
That is an overview of the book: very uneven, with both very good parts and bad, but if everything is all combined, the total package is a pretty good one.Negative Math: How Mathematical Rules Can Be Positively Bent Overview

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WJ III Clinical Use and Interpretation: Scientist-Practitioner Perspectives (Practical Resources for the Mental Health Professional) Review

WJ III Clinical Use and Interpretation: Scientist-Practitioner Perspectives (Practical Resources for the Mental Health Professional)
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WJ III Clinical Use and Interpretation: Scientist-Practitioner Perspectives (Practical Resources for the Mental Health Professional) ReviewThis text is a great resource for graduate students as well as practicing Learning Consultants.WJ III Clinical Use and Interpretation: Scientist-Practitioner Perspectives (Practical Resources for the Mental Health Professional) OverviewWJ III Clinical Use and Interpretation presents a wide variety of clinical applications of the WJ III from leading experts. Each chapter will provide the reader with insights into patterns of cluster and test scores from both the WJ III Tests of Cognitive Abilities and WJ III Tests of Achievement that can assist with interpretation and formulation of diagnostic hypotheses for clinical practice. WJ III Clinical Use and Interpretation provides expert guidance for using the WJ III with individuals with a broad array of learning and neuropsychological problems, including learning disabilities and Attention Deficit/Hyperactivity Disorder. New research included in this volume emphasizes the value of the WJ III for identification of gifted children and adolescents and young children with developmental delays.* Written by the leading experts on the WJ III* Coverage of both the Tests of Cognitive Abilities and Tests of Achievement* Provides expert guidance on using the WJ III with a variety of clinical populations* Includes new research and illustrative case studies* Goes beyond interpretive material published in the Examiner's Manuals and other resource books

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The Equation That Couldn't Be Solved: How Mathematical Genius Discovered the Language of Symmetry Review

The Equation That Couldn't Be Solved: How Mathematical Genius Discovered the Language of Symmetry
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The Equation That Couldn't Be Solved: How Mathematical Genius Discovered the Language of Symmetry ReviewMario Livio's title suggests an exploration of unsolvable equations, in particular the drama enshrouding the mathematical conundrum of solving general, fifth degree polynomial equations, known as quintics. His subtitle, "How Mathematical Genius Discovered the Language of Symmetry," indicates that his work will also explore the role of symmetry in ultimately resolving the question of whether such polynomials could be solved by a formulas using nothing more than addition, subtraction, multiplication, division, and nth roots. These two subjects portend an interesting discussion on the solvability of equations and the peculiar mathematical race in Renaissance Europe to "discover" the magical formulas for solving cubics and quartics.
One could reasonably expect that the groundbreaking work of Tartaglia, Cardano. Ferraro, Galois, Abel, Kronecker, Hermite, and Klein would be encompassed in this survey, and indeed they are. However, purchasers of this book are given no indication that they will spend well over half their reading time on rehashes of Abel's tragic life story and the mythology of Evariste Galois's foolish death, Emmy Noether's challenges as a woman mathematician in Germany, a history of group theory, Einstein's theory of relativity, the place of string theory in modern cosmology, the survival benefits of symmetry in evolution, Daniel Gorenstein's 30-year proof that "every finite simple group is either a member of one of the eighteen families or is one of the twenty-six sporadic groups," a trite and unnecessary diversion on human creativity, and finally, an even more outlandish (and utterly inconclusive) "comparison" of Galois's brain with that of Albert Einstein. The persevering reader can only conclude that anything and everything that remotely touches upon the quintic and Galois's work was given a chapter of its own, a mathematical version of "everything but the kitchen sink." The end result is an unfortunate mishmash, a sort of treetop skimming of modern mathematics, post-Newtonian physics, and cognitive theory.
Sadly, Mr. Livio misses a number of opportunities to enlighten his readers on the theory of polynomials, the nature of their roots, and the curious symmetries one encounters. For example, he makes no effort to discuss the nature of polynomial roots beyond a short Appendix, and he passes on the chance to detail the marvelous symmetry of imaginary roots in equations such as x^6 = 1. While he outlines the general thrust of Galois's approach to the unsolvability of quintics, Livio also mentions that Hermite found a method to solve the general quintic using elliptic functions, but we are not told how such a solution is discovered. What about sixth degree polynomials and beyond? Mr. Livio doesn't tell us - he's too busy worrying over the fairness of the first draft lottery in 1970. There is also the small matter of the author's style of explication. At times, such as his introduction to symmetry, he writes for a general, non-mathematical audience. Later, he tosses out references to elliptic functions without explanation and culminates his group theory discussion with sentences like, "We can use the family tree of these subgroups to create a sequence of composition factors (order of the parent group divided by that of the maximal normal subgroup)."
What THE EQUATION THAT COULDN'T BE SOLVED really needed was a good editor to bring these widespread ramblings into focus. A bit of truth in advertising might have been appropriate as well, but a book entitled "The Role of Group Theory in Modern Mathematics and Science" (primarily what this book is about, along with the author's peculiar obsession with Evariste Galois's death by duel) wouldn't tap well into the market developed by Keith Devlin, John Allen Paulos, Ian Stewart, Eli Maor, Simon Singh, and other popularizers of mathematics for mass market audiences. In the end, this book falls short of its companions for its sheer lack of focus and somewhat misleading cover presentation. At times, the book is interesting; at others, regrettably, it's simply too much of a superficial slog through too many loosely connected disciplines.The Equation That Couldn't Be Solved: How Mathematical Genius Discovered the Language of Symmetry Overview

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