January 2009


Some mathematicians are birds, others are frogs. Birds fly high in the
air and survey broad vistas of mathematics out to the far
horizon. They delight in concepts that unify our thinking and bring
together diverse problems from different parts of the landscape. Frogs
live in the mud below and see only the flowers that grow nearby. They
delight in the details of particular objects, and they solve problems
one at a time.

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