Pith Number

pith:K43V4SWG

pith:1994:K43V4SWG6LGUOPASBUCBMIKY4H

not attested not anchored not stored refs pending

The Chern-Simons Invariant as the Natural Time Variable for Classical and Quantum Cosmology

Chopin Soo, Lee Smolin

arxiv:gr-qc/9405015 v2 · 1994-05-06 · gr-qc · 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{K43V4SWG6LGUOPASBUCBMIKY4H}

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	2026-05-18T04:17:52.738117Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

57375e4ac6f2cd473c120d04162158e1d8fc39605e3d0b9857af658d6ee4f703

Aliases

arxiv: gr-qc/9405015 · arxiv_version: gr-qc/9405015v2 · doi: 10.48550/arxiv.gr-qc/9405015 · pith_short_12: K43V4SWG6LGU · pith_short_16: K43V4SWG6LGUOPAS · pith_short_8: K43V4SWG

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/K43V4SWG6LGUOPASBUCBMIKY4H \
  | 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: 57375e4ac6f2cd473c120d04162158e1d8fc39605e3d0b9857af658d6ee4f703

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c5355cdbe1a00f701b20290e539c574642c77d8865e3c553de7156d9c8c2e1e",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1994-05-06T18:52:59Z",
    "title_canon_sha256": "f831f3a44a6616bd6b42a0f858fee49be42a385852defeb59b064b985388d1a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9405015",
    "kind": "arxiv",
    "version": 2
  }
}