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Steven Hatton

I use square brackets for function parameters e.g., $\mathit{f}\left[x\right]$. This is because function parameter lists are semantically distinct from algebraic groupings. There are occasions when my notation collides with the common usage, for example, commutator notation. For such situations I will use \left[\![\_,\_\right]\!].

$\left[\![ \_,\_ \right]\!]$

The most difficult chapter I have encountered in mathematics in the past few decades is Vol I, Part B, Chapter 1: Construction of the System of Real Numbers in Fundamentals of Mathematics.

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