Pith Number

pith:7XOHFWXW

pith:1994:7XOHFWXWBUAGS6H7E6QGOCS2QL

not attested not anchored not stored refs pending

Barriers in Quantum Gravity

Jan Ambjorn

arxiv:hep-th/9408129 v1 · 1994-08-23 · 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{7XOHFWXWBUAGS6H7E6QGOCS2QL}

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	2026-05-18T01:00:26.153405Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fddc72daf60d006978ff27a0670a5a82c48cbee6cd2d1620ea3d35fcea849464

Aliases

arxiv: hep-th/9408129 · arxiv_version: hep-th/9408129v1 · doi: 10.48550/arxiv.hep-th/9408129 · pith_short_12: 7XOHFWXWBUAG · pith_short_16: 7XOHFWXWBUAGS6H7 · pith_short_8: 7XOHFWXW

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/7XOHFWXWBUAGS6H7E6QGOCS2QL \
  | 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: fddc72daf60d006978ff27a0670a5a82c48cbee6cd2d1620ea3d35fcea849464

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cba77ee1af6857626c783eb216377473330ed8075ecf2ae23ee0249415eac76d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "1994-08-23T22:25:38Z",
    "title_canon_sha256": "1546200eb6c0d7a0334e62d3d43a782d384fab3b629ebc486da6f03636f515b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/9408129",
    "kind": "arxiv",
    "version": 1
  }
}