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The Mathematics of Long-Range Aperiodic Order (Paperback, Softcover reprint of hardcover 1st ed. 1997)
Loot Price: R7,709
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The Mathematics of Long-Range Aperiodic Order (Paperback, Softcover reprint of hardcover 1st ed. 1997)
Series: NATO Science Series C, 489
Expected to ship within 18 - 22 working days
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THEOREM: Rotational symmetries of order greater than six, and also
five-fold rotational symmetry, are impossible for a periodic
pattern in the plane or in three-dimensional space. The discovery
of quasicrystals shattered this fundamental 'law', not by showing
it to be logically false but by showing that periodicity was not
synonymous with long-range order, if by 'long-range order' we mean
whatever order is necessary for a crystal to produce a diffraction
pat tern with sharp bright spots. It suggested that we may not know
what 'long-range order' means, nor what a 'crystal' is, nor how
'symmetry' should be defined. Since 1984, solid state science has
been under going a veritable K uhnian revolution. -M. SENECHAL,
Quasicrystals and Geometry Between total order and total disorder
He the vast majority of physical structures and processes that we
see around us in the natural world. On the whole our mathematics is
well developed for describing the totally ordered or totally
disordered worlds. But in reality the two are rarely separated and
the mathematical tools required to investigate these in-between
states in depth are in their infancy."
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