Victor Eijkhout
= Victor Eijkhout
{c}
<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.<TeX by Topic by Victor Eijkhout>[Title page; Chapter 1, The Structure of the TeX Processor; Chapters 11–12, Macros and Expansion]{ref}
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.<TeX by Topic by Victor Eijkhout>[§§11.2 and 11.5.1, definition layout and undelimited arguments]{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.<Victor Eijkhout profile by the Texas Advanced Computing Center>[Areas of Research and Publications]{ref}
\Image[https://tacc.utexas.edu/media/filer_public_thumbnails/filer_public/aa/16/aa16b14b-32a4-437b-84f5-652c1d36c240/victor-eijkhout.png__500x625_q85_subsampling-2.jpg]
{title=Portrait of <Victor Eijkhout>}
{description=Portrait linked from the institutional profile at the Texas Advanced Computing Center.}
{source=https://tacc.utexas.edu/about/staff-directory/victor-eijkhout/}
{width=250}