A Course in Combinatorics
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A Course in Combinatorics

J. H. van Lint, R. M. Wilson

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eBook - PDF

A Course in Combinatorics

J. H. van Lint, R. M. Wilson

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About This Book

This is the second edition of a popular book on combinatorics, a subject dealing with ways of arranging and distributing objects, and which involves ideas from geometry, algebra and analysis. The breadth of the theory is matched by that of its applications, which include topics as diverse as codes, circuit design and algorithm complexity. It has thus become essential for workers in many scientific fields to have some familiarity with the subject. The authors have tried to be as comprehensive as possible, dealing in a unified manner with, for example, graph theory, extremal problems, designs, colorings and codes. The depth and breadth of the coverage make the book a unique guide to the whole of the subject. The book is ideal for courses on combinatorical mathematics at the advanced undergraduate or beginning graduate level. Working mathematicians and scientists will also find it a valuable introduction and reference.

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Information

Year
2001
ISBN
9780511668777
1.
Graphs
3
in
both
graphs
(using
1
,
2
,
3
,
4
,
5
,
6)
and
observe
that
the
edge
sets
are
the
same
sets
of
unordered
pairs.
Figure
1.3
A
permutation
σ
of
the
vertex
set
of
a
graph
G
with
the
property
that
{
a,
b
}
is
an
edge
if
and
only
if
{
σ
(
a
)
,
σ
(
b
)
}
is
an
edge,
is
called
an
automorphism
of
G
.
Problem
1A.
(i)
Show
that
the
drawings
in
Fig.
1.4
represent
the
same
graph
(or
isomorphic
graphs).
(ii)
Find
the
group
of
automorphisms
of
the
graph
in
Fig.
1.4.
Remark:
There
is
no
quick
or
easy
way
to
do
this
unless
you
are
lucky;
you
will
have
to
experiment
and
try
things.
Figure
1.4
The
complete
graph
K
n
on
n
vertices
is
the
simple
graph
that
has
all
(
n
2
)
possible
edges.
Two
vertices
a
and
b
of
a
graph
G
are
called
adjacent
if
they
are
distinct
and
joined
by
an
edge.
We
will
use
Γ(
x
)
to
denote
the
set
of
all
vertices
adjacent
to
a
given
vertex
x
;
these
vertices
are
also
called
the
neighbors
of
x
.

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