Archimedes
worked out the ratio of the length of a
circle's circumference to its radius
(pi), discovered the principle of
buoyancy, explored the principle of the
lever, and devised numerous machines to
help defend his home town from invading
Roman armies. |
|
The Difference
Engine was conceived to
calculate and automatically print
error-free mathematical tables. It is so
named because of the mathematical
principle upon which it is based, the
method of finite differences. |
|