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The Mathematics of Anthropology

A Step-by-Step Companion to The Dual Geometry of People and News

Alexy Khrabrov

4 October 2026 | Edition 1.1.0-9ce09c2a

Preface
- Where to revisit a prerequisite
Reading and notation guide
- Read a symbol as a named object
- Keep the measuring objects distinct
1 What it means to make a person a news source
2 The small amount of linear algebra we need
3 Measuring an article on named news axes
4 Combining articles into a person profile
5 A population of profiles makes a people basis
6 One loading table has two entrances
7 Returning through the map loses detail
8 Finding neighbors without inventing relationships
9 People can move while the map stays fixed
10 Relevance and significance answer different questions
11 Shared concepts across three sites
12 Following the evidence all the way back
Notation and shapes
Answers to the checks
Reproducing the examples
Glossary
Subject index

Tutorial sources and reproducible examples (ZIP). Synthetic examples and compact evidence; restricted raw archives are excluded.