Victor Eijkhout is a computing researcher and author of TeX by Topic by Victor Eijkhout, a technical reference explaining how TeX processes input, expands macros and builds typeset material. Its subject-based organization makes the distinction between TeX tokens, TeX expansion and later layout operations explicit.[ref]
TeX by Topic by Victor Eijkhout. Title page; Chapter 1, The Structure of the TeX Processor; Chapters 11–12, Macros and Expansion
A small example illustrates the kind of mechanism such a reference explains. Define a TeX macro with
\def\double#1{#1#1}. The call \double{ab} substitutes the argument's two letter tokens twice, producing the expanded letter-token sequence abab. In contrast, \double ab takes only the next unbraced letter token as its argument; the remaining b follows the replacement, giving aab. These are own illustrative calls under ordinary tokenization, not quotations from the book.[ref]The example shows why reading source as raw character substitution can be misleading. Argument boundaries and tokenization are part of the computation; the eventual visual layout is a later concern. That separation connects a practical typesetting problem with more general ideas about programming language processing.
His institutional profile also identifies work in numerical linear algebra, scientific computing and parallel computing, and links his computing textbooks. These are professional contributions beyond the TeX reference, rather than evidence inferred from a similarly named person.[ref]
Portrait of Victor Eijkhout
. Portrait linked from the institutional profile at the Texas Advanced Computing Center. Source. Articles by others on the same topic
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