Why German Heraldry Loves Buffalo Horns
A pair of enormous horns was once a physical ornament on a medieval helmet. German heraldry turned it into something rather more permanent.
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A Mathematician A Different Kind
of Mathematician And a Statistician
Mathematics, software, public policy—and the occasional strange project.
Ir-rieda biss tmexxi l-qalb
Notes from the Working Archive
From the Blog
More Recent Writing
Zero and the Last Integer
A conversation about proving there are infinitely many integers leads from a simple sum to zero, the successor operation, and the rather different problem of establishing an infinite set.
ReadThe Last Person Who Knows Why
One of the peculiar things about computer programs is that they can keep doing their jobs long after everyone has forgotten why they do them that way. Usually this is considered a…
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Independent Sites & Ongoing Work
Selected Projects
Public history
1812 The Whole Story
The War of 1812 told as one connected story, with maps, evidence, timelines, and interactive historical systems.
Begin the story
Virtual exhibition
Judith &
Holofernes
The Fatal Image
A virtual exhibition following Judith and Holofernes through art, text, time, and place.
Enter the exhibitionHeraldry & education
The Heraldry Project
A freely accessible school of heraldry, with illustrated lessons, interactive shield design, national traditions, and primary sources.
Mathematics & education
The Mathematics Project
A developing open-access mathematics classroom with statistics and calculus lessons, interactive laboratories, and worked examples.
Research & advocacy
The Count of Krigsvold
Polar education, research support, and evidence-led advocacy focused on Antarctica and its global consequences.
Public history
The Manor of the Dungeon in Kent
A public-history project tracing a Canterbury manor, its people, its documents, and the limits of a modern claim.
Books with a Life Beyond the Page
Methods You Can Put to Work
Book companion Two editions
Teaching and Learning Mathematics Online
Co-editor with John F. Beyers
2nd edition 2025
Explore both editions, their chapters and contributors, and resources for teaching mathematics online.
Book companion
Computational Methods for Numerical Analysis
Author · 1st edition
The living companion to Computational Methods for Numerical Analysis with R, with methods, code, laboratories, and teaching material.
Explore the companion
Book companion
Handbook of Military & Defense Operations Research
Co-editor with Natalie M. Scala · 2nd edition
The companion site for Handbook of Military & Defense Operations Research, bringing the book, its authors, and supporting material together.
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People, Symbols & the Documentary Record
The Personal Archive
Ancestry
Documented lineages, people, places, and the evidence connecting them.
Coat of Arms
The grant, insignia, emblazonments, tartan, and documentary record.
Honors
Awards, appointments, decorations, and other recognition.
Media Archive
Interviews, quotations, profiles, and appearances collected over the years.