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Pay per event

DLMF NIST Math Functions Scraper

Scrapes the NIST Digital Library of Mathematical Functions (DLMF) for structured equation data: MathML, LaTeX source, constraints, and referenced functions — across all 36 chapters and hundreds of sections.

Pricing

Pay per event

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0.0

(0)

Developer

BowTiedRaccoon

Actor stats

Bookmarked

Total users

Monthly active users

3 days ago

Last modified

What it does

The actor performs a three-level hierarchical crawl:

Index — discovers all 36 DLMF chapters from the homepage
Chapter pages — discovers all sections within each chapter (typically 10–20 sections)
Section pages — extracts every numbered equation including MathML, LaTeX TeX source, plain-text rendering, referenced symbols, and the canonical permalink

Across all 36 chapters the DLMF contains approximately 5,000–10,000 numbered equations. A full crawl completes in minutes at the default concurrency.

Output fields

Field	Description
`chapter`	Chapter number (integer, 1–36)
`section`	Section identifier, e.g. `1.2`
`title`	Section title, e.g. `Elementary Algebra`
`equation_number`	DLMF equation number, e.g. `1.2.1`
`equation_mathml`	Full MathML XML for the equation
`equation_tex`	LaTeX source recovered from MathML `alttext` attribute
`equation_text`	Unicode plain-text rendering of the equation
`constraints`	Constraint text associated with the equation (if any)
`referenced_functions`	Pipe-separated list of symbol/function names referenced
`url`	Canonical DLMF permalink, e.g. `http://dlmf.nist.gov/1.2.E1`

Use cases

Symbolic math / CAS training data — verified special-function formulas with LaTeX and MathML
RAG / vector search corpora — ground-truth equation database for scientific-computing AI agents
Formula search engines — structured index of equations by chapter/section with canonical IDs
Verification datasets — NIST-authoritative identities for function evaluations

Input parameters

Parameter	Type	Default	Description
`maxItems`	integer	10	Maximum number of equations to scrape (0 = unlimited)
`startChapter`	integer	1	First chapter to crawl (1–36)
`endChapter`	integer	36	Last chapter to crawl (1–36, omit for all)

Example output record

{
  "chapter": 1,
  "section": "1.2",
  "title": "Elementary Algebra",
  "equation_number": "1.2.1",
  "equation_tex": "\\genfrac{(}{)}{0.0pt}{}{n}{k}=\\frac{n!}{(n-k)!k!}",
  "equation_text": "(nk)=n!/(n−k)!⁢k!",
  "constraints": "",
  "referenced_functions": "(mn): binomial coefficient | !: factorial (as in n!) | n:  nonnegative integer",
  "url": "http://dlmf.nist.gov/1.2.E1"
}

Notes

The DLMF is a US government publication (NIST). Content is in the public domain.
No proxy required — dlmf.nist.gov is a clean US gov host with no anti-bot measures.
Chapter 1 alone contains ~180 equations across 18 sections. Full 36-chapter run yields ~5,000+ records.
Sections containing only notation tables (no numbered equations) return 0 results — this is expected.

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