Pith Number

pith:UOZT4E4Z

pith:1997:UOZT4E4ZFPOB7EEWGARALI5F6R

not attested not anchored not stored refs pending

Quantum Pasts and the Utility of History

James B. Hartle (University of California, Santa Barbara)

arxiv:gr-qc/9712001 v1 · 1997-12-02 · gr-qc · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UOZT4E4ZFPOB7EEWGARALI5F6R}

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	2026-05-18T03:02:18.670368Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3b33e13992bdc1f9096302205a3a5f4640313d41d24d0dad7f5e9661b2273e6

Aliases

arxiv: gr-qc/9712001 · arxiv_version: gr-qc/9712001v1 · doi: 10.48550/arxiv.gr-qc/9712001 · pith_short_12: UOZT4E4ZFPOB · pith_short_16: UOZT4E4ZFPOB7EEW · pith_short_8: UOZT4E4Z

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/UOZT4E4ZFPOB7EEWGARALI5F6R \
  | 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: a3b33e13992bdc1f9096302205a3a5f4640313d41d24d0dad7f5e9661b2273e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6795d05086a39f274107657ba2055fc21747c56e2edc7748cc628415ef09b529",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1997-12-02T00:46:12Z",
    "title_canon_sha256": "4f05e0d53eca02b07fee8bb3fca57c1a0dde1d3fb6008b2974314f6ac5ea787a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9712001",
    "kind": "arxiv",
    "version": 1
  }
}