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Preliminaries
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Phlex adopts a *functional programming* paradigm, which is heavily influenced by mathematics.
To adequately describe what functional programming is, we first introduce function notation and what we mean by "types".
With these ingredients, we are then able to discuss functional programming and how it is supported by data-flow graphs.

.. toctree::
   :maxdepth: 2

   ch_preliminaries/function_notation
   ch_preliminaries/types
   ch_preliminaries/sequences
   ch_preliminaries/functional_programming
   ch_preliminaries/data_flow