|
Showing 1 - 24 of
24 matches in All Departments
This volume describes why a microscope is necessary, the
interactions of light with matter and the use of the stereo
low-power microscope. It examines the high-power compound
microscope, detailing both the older stands with separate lamp, as
well as the latest research models with integral illumination and
infinity-corrected optics.
"My desire was to paint a series of word pictures of the North as I
knew it, of the fur trade of an earlier day, and of the men and
women who walked the stage at that particular time." -Harold Kemp
First published in 1956, "Northern Trader" is a historically
valuable, intimately personal and vividly expressed memoir of the
last days of the fur trade. A gifted writer, Harold Kemp recounts
the routine and rhythms of that long-lost way of life; a life that
had been "following the same placid course that it had been
following for the past two hundred years"; a life in which "bark
canoes were still built, muzzle-loaders still used," and where the
north was "a vast region of infinite allure in which a young man
could test his characters, make his name, and earn a living far
distant from the mundane familiarities of town or city." Kemp tells
how, as a teenager, he was fascinated by a map of northern
Saskatchewan with "too many blank, unexplored areas on it, too many
lakes half-drawn, too many rivers that terminate only in dotted
lines."
Kemp's palpable, often gripping prose recounts life on the trail in
all seasons: paddling freight canoes, being under sail in a York
boat, packing one's own weight on portages, running on snowshoes to
break trail for dogs pulling loaded toboggans, and making camp at
the end of an exhausting day.
Equally impressive, historically, are his depictions of the Cree
among whom he lived, whose language he spoke, whose skills he
admired, and whose customs he respected.
Along with many small improvements, this revised edition contains
van Yzeren's new proof of Pascal's theorem (1.7) and, in Chapter 2,
an improved treatment of order and sense. The Sylvester-Gallai
theorem, instead of being introduced as a curiosity, is now used as
an essential step in the theory of harmonic separation (3.34). This
makes the logi cal development self-contained: the footnotes
involving the References (pp. 214-216) are for comparison with
earlier treatments, and to give credit where it is due, not to fill
gaps in the argument. H.S.M.C. November 1992 v Preface to the
Second Edition Why should one study the real plane? To this
question, put by those who advocate the complex plane, or geometry
over a general field, I would reply that the real plane is an easy
first step. Most of the prop erties are closely analogous, and the
real field has the advantage of intuitive accessibility. Moreover,
real geometry is exactly what is needed for the projective approach
to non-Euclidean geometry. Instead of introducing the affine and
Euclidean metrics as in Chapters 8 and 9, we could just as well
take the locus of 'points at infinity' to be a conic, or replace
the absolute involution by an absolute polarity.
Modern Methods of Plant Analysis When the handbook Modern Methods
of Plant Analysis, was first introduced in 1954, the considerations
were: 1. the dependence of scientific progress in biology on the
improvement of existing and the introduction of new methods; - 2.
the difficulty in finding many new analytical methods in
specialized journals which are normally not accessible to
experimental plant biologists; 3. the fact that in the methods
sections of papers the description of methods is frequently so
compact, or even sometimes to incomplete, that it is difficult to
reproduce experiments. These considerations still stand today. The
series was highly successful, seven volumes appearing between 1956
and 1964. Since there is still today a demand for the old series,
the publisher has decided to resume publication of Modern Methods
of Plant Analysis. It is hoped that the New Series will be just as
acceptable to those working in plant sciences and related fields as
the early volumes undoubtedly were. It is difficult to single out
the major reasons for the success of any publication, but we
believe that the methods published in the first series were
up-to-date at the time and presented in a way that made
description, as applied to plant material, complete in itself with
little need to consult other publications. Contribution authors
have attempted to follow these guidelines in this New Series of
volumes. Editorial The earlier series of Modern Methods of Plant
Analysis was initiated by Michel v.
Along with many small improvements, this revised edition contains
van Yzeren's new proof of Pascal's theorem ( 1.7) and, in Chapter
2, an improved treatment of order and sense. The Sylvester-Gallai
theorem, instead of being introduced as a curiosity, is now used as
an essential step in the theory of harmonic separation ( 3.34).
This makes the logi cal development self-contained: the footnotes
involving the References (pp. 214-216) are for comparison with
earlier treatments, and to give credit where it is due, not to fill
gaps in the argument. H.S.M.C. November 1992 v Preface to the
Second Edition Why should one study the real plane? To this
question, put by those who advocate the complex plane, or geometry
over a general field, I would reply that the real plane is an easy
first step. Most of the prop erties are closely analogous, and the
real field has the advantage of intuitive accessibility. Moreover,
real geometry is exactly what is needed for the projective approach
to non. Euclidean geometry. Instead of introducing the affine and
Euclidean metrics as in Chapters 8 and 9, we could just as well
take the locus of 'points at infinity' to be a conic, or replace
the absolute involution by an absolute polarity."
In Euclidean geometry, constructions are made with ruler and compass. Projective geometry is simpler: its constructions require only a ruler. In projective geometry one never measures anything, instead, one relates one set of points to another by a projectivity. The first two chapters of this book introduce the important concepts of the subject and provide the logical foundations. The third and fourth chapters introduce the famous theorems of Desargues and Pappus. Chapters 5 and 6 make use of projectivities on a line and plane, repectively. The next three chapters develop a self-contained account of von Staudt's approach to the theory of conics. The modern approach used in that development is exploited in Chapter 10, which deals with the simplest finite geometry that is rich enough to illustrate all the theorems nontrivially. The concluding chapters show the connections among projective, Euclidean, and analytic geometry.
Along with many small improvements, this revised edition contains
van Yzeren's new proof of Pascal's theorem (1.7) and, in Chapter 2,
an improved treatment of order and sense. The Sylvester-Gallai
theorem, instead of being introduced as a curiosity, is now used as
an essential step in the theory of harmonic separation (3.34). This
makes the logi cal development self-contained: the footnotes
involving the References (pp. 214-216) are for comparison with
earlier treatments, and to give credit where it is due, not to fill
gaps in the argument. H.S.M.C. November 1992 v Preface to the
Second Edition Why should one study the real plane? To this
question, put by those who advocate the complex plane, or geometry
over a general field, I would reply that the real plane is an easy
first step. Most of the prop erties are closely analogous, and the
real field has the advantage of intuitive accessibility. Moreover,
real geometry is exactly what is needed for the projective approach
to non* Euclidean geometry. Instead of introducing the affine and
Euclidean metrics as in Chapters 8 and 9, we could just as well
take the locus of 'points at infinity' to be a conic, or replace
the absolute involution by an absolute polarity.
The Fifty-Nine Icosahedra was originally published in 1938 as No. 6
of "University of Toronto Studies (Mathematical Series)." Of the
four authors, only Coxeter and myself are still alive, and we two
are the authors of the whole text of the book, in which any signs
of immaturity may perhaps be regarded leniently on noting that both
of us were still in our twenties when it was written. N either of
the others was a professional mathematician. Flather died about
1950, and Petrie, tragically, in a road accident in 1972. Petrie's
part in the book consisted in the extremely difficult drawings
which consti tute the left half of each of the plates (the much
simpler ones on the right being mine). A brief biographical note on
Petrie will be found on p. 32 of Coxeter's Regular Polytopes (3rd.
ed., Dover, New York, 1973); and it may be added that he was still
a schoolboy when he discovered the regular skew polygons that are
named after him, and are the occasion for the note on him in
Coxeter's book. (Coxeter also was a schoolboy when some of the
results for which he will be most remembered were obtained; he and
Petrie were schoolboy friends and used to work together on
polyhedron and polytope theory. ) Flather's part in the book
consisted in making a very beautiful set of miniature models of all
the fifty-nine figures. These are still in existence, and in
excellent preservation."
This classic work is now available in an unabridged paperback edition. The Second Edition retains all the characterisitcs that made the first edition so popular: brilliant exposition, the flexibility permitted by relatively self-contained chapters, and broad coverage ranging from topics in the Euclidean plane, to affine geometry, projective geometry, differential geometry, and topology. The Second Edition incorporates improvements in the text and in some proofs, takes note of the solution of the 4-color map problem, and provides answers to most of the exercises.
This book delivers the latest developments in object technology and
their impact in computing systems re-engineering. Object-oriented
programming is here shown to provide support for constructing large
scale systems that are cheaply built and with reusable components,
adaptable to changing requirements and use efficient and
cost-effective techniques.
Internationally recognised authorities from Finland, France,
Germany, Italy, Poland, Spain, the UK and the USA here record their
research and development work on the industrial techniques and
structured object-oriented methodologies in forward and reverse
engineering of computing systems. This book takes stock of progress
of that work showing its promise and feasibility, and how its
structured technology can overcome the limitations of forward
engineering methods used in industry. Forward methods are focused
in the domain of reverse engineering to implement a high level of
specification for existing software.
The book contains the selected, quintessential content of the first
UK Colloquium on Object Technology and Systems Re-Engineering held
at Oxford University in 1998. The conference was sponsored by
British Telecom Laboratories, EMSI limited and the OOSP Specialised
Group of The British Computer Society.
Delivers the latest developments in object technology and their
impact in computing systems re-engineeringProvides support for
constructing large scale systems that are cheaply built and with
reusable components, adaptable to changing requirements and use
efficient and cost-effective techniquesContains the content of the
first UK Colloquium on Object Technology and Systems Re-Engineering
held at Oxford University in 1998
Among the many beautiful and nontrivial theorems in geometry found
in Geometry Revisited are the theorems of Ceva, Menelaus, Pappus,
Desargues, Pascal, and Brianchon. A nice proof is given of Morley's
remarkable theorem on angle trisectors. The transformational point
of view is emphasized: reflections, rotations, translations,
similarities, inversions, and affine and projective
transformations. Many fascinating properties of circles, triangles,
quadrilaterals, and conics are developed.
|
My Big Christmas Activity Book Kids Ages 6-8 - A Fun Kid Educational Workbook Game For Learning, Advent Calendar, Connect the dots, Coloring, color bye numbers, Mazes Puzzle, Word Search, Look & find, Matching, Addition, Hidden Picture, Riddle and More! (Paperback)
Hsm Publications
|
R366
Discovery Miles 3 660
|
Ships in 10 - 15 working days
|
The name non-Euclidean was used by Gauss to describe a system of
geometry which differs from Euclid's in its properties of
parallelism. Such a system was developed independently by Bolyai in
Hungary and Lobatschewsky in Russia, about 120 years ago. Another
system, differing more radically from Euclid's, was suggested later
by Riemann in Germany and Cayley in England. The subject was
unified in 1871 by Klein, who gave the names of parabolic,
hyperbolic, and elliptic to the respective systems of
Euclid-Bolyai-Lobatschewsky, and Riemann-Cayley. Since then, a vast
literature has accumulated. The Fifth edition adds a new chapter,
which includes a description of the two families of 'mid-lines'
between two given lines, an elementary derivation of the basic
formulae of spherical trigonometry and hyperbolic trigonometry, a
computation of the Gaussian curvature of the elliptic and
hyperbolic planes, and a proof of Schlafli's remarkable formula for
the differential of the volume of a tetrahedron.
Foremost book available on polytopes, incorporating ancient Greek and most modern work done on them. Beginning with polygons and polyhedrons, the book moves on to multi-dimensional polytopes in a way that anyone with a basic knowledge of geometry and trigonometry can easily understand. Definitions of symbols. Eight tables plus many diagrams and examples.1963 ed.
|
|