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Leonhard
Euler 
1707
 1783 

Leonhard
Euler's
intellect
was towering
and his
work in
mathematics
panoramic.
In the
words of
the eminent
mathematical
historian,
W.W. Rouse
Ball, Euler "created
a good
deal of
analysis,
and revised
almost
all the
branches
of pure
mathematics
which were
then known
filling
up the
details,
adding
proofs,
and arranging
the whole
in a
consistent
form." 

Euler's
image is
incised
with a
very elegant
and symbolically
rich formula,
a consequence
of Euler's
famous
equation.
It
incorporates
the chief
symbols
in mathematical
history
up to that
time 
the principal
whole numbers
0 and 1,
the chief
mathematical
relations
+ and =,
pi the
discovery
of Hippocrates,
i the
sign for
the "impossible"
square
root of
minus one,
and the
logarithm
base e.
The
intricate
shadow cast
on Euler's
image is
in fact
a
view of the city of Königsberg as
it was in Euler's day, showing the seven
bridges over the
River Pregel.
Euler enjoyed solving puzzling problems for
recreational amusement, and tackled the problem of
whether all seven bridges of Konigsberg could be crossed
without recrossing any one of them. In solving the
problem, which he did by mathematically representing
and formalizing it  Euler gave birth to modern graph
theory.


Euler's
portrait
uses a similar
color palette
to those
of Newton and Leibniz,
whose work
Euler built
on, expanded,
and colored
with valuable
analytical
insight.




