Pith Number

pith:YUSFDK4R

pith:2009:YUSFDK4R53AXYY24GIGUBEOYRF

not attested not anchored not stored refs pending

Three Etudes in QFT

Dirk Kreimer

arxiv:0909.4424 v1 · 2009-09-24 · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YUSFDK4R53AXYY24GIGUBEOYRF}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:37:38.675781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c52451ab91eec17c635c320d4091d889789940001a8cc260a138a99785a90288

Aliases

arxiv: 0909.4424 · arxiv_version: 0909.4424v1 · doi: 10.48550/arxiv.0909.4424 · pith_short_12: YUSFDK4R53AX · pith_short_16: YUSFDK4R53AXYY24 · pith_short_8: YUSFDK4R

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YUSFDK4R53AXYY24GIGUBEOYRF \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c52451ab91eec17c635c320d4091d889789940001a8cc260a138a99785a90288

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d378dcc820f5a392f7e42ef8697a0bd0e3667d34001979f133cd4eee95f3ceb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2009-09-24T12:28:02Z",
    "title_canon_sha256": "7c85d5400f060655b993c1b03787dcde5e82ae8ec6dc0e4d499a3668b885434b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.4424",
    "kind": "arxiv",
    "version": 1
  }
}