Pith Number

pith:3JKIWPBT

pith:2009:3JKIWPBTU4O56ZRYTMW6BR72JD

not attested not anchored not stored refs pending

Does time exist in quantum gravity?

Claus Kiefer

arxiv:0909.3767 v1 · 2009-09-21 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3JKIWPBTU4O56ZRYTMW6BR72JD}

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	2026-07-04T15:50:18.101971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da548b3c33a71ddf66389b2de0c7fa48e777a0498bc76361aeafef2b34d9e876

Aliases

arxiv: 0909.3767 · arxiv_version: 0909.3767v1 · doi: 10.48550/arxiv.0909.3767 · pith_short_12: 3JKIWPBTU4O5 · pith_short_16: 3JKIWPBTU4O56ZRY · pith_short_8: 3JKIWPBT

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/3JKIWPBTU4O56ZRYTMW6BR72JD \
  | 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: da548b3c33a71ddf66389b2de0c7fa48e777a0498bc76361aeafef2b34d9e876

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c0620bc849f0c0e1182e1db066e1b7ca4488ea85eb6def5b09beb653c03630c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-09-21T13:19:59Z",
    "title_canon_sha256": "8d71d94f6d5c45c3b6e380a5ee868abd860162002945c712f946c6bad3e8c892"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3767",
    "kind": "arxiv",
    "version": 1
  }
}