Pith Number

pith:H4RHUUCW

pith:2012:H4RHUUCWADR2TRF4E2YH4RZUS6

not attested not anchored not stored refs pending

A perspective on the landscape problem

Lee Smolin

arxiv:1202.3373 v1 · 2012-02-15 · physics.hist-ph · 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{H4RHUUCWADR2TRF4E2YH4RZUS6}

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	2026-05-18T01:58:27.982157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f227a505600e3a9c4bc26b07e473497b4a642331fd3a242b4c01c5db59dd72b

Aliases

arxiv: 1202.3373 · arxiv_version: 1202.3373v1 · doi: 10.48550/arxiv.1202.3373 · pith_short_12: H4RHUUCWADR2 · pith_short_16: H4RHUUCWADR2TRF4 · pith_short_8: H4RHUUCW

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/H4RHUUCWADR2TRF4E2YH4RZUS6 \
  | 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: 3f227a505600e3a9c4bc26b07e473497b4a642331fd3a242b4c01c5db59dd72b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3e74b3922558d8e20a1383389a0056290907083689778e2bead2ffefd2ea3a2",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-02-15T17:07:21Z",
    "title_canon_sha256": "67c4c9d2bbe18e7bcd3d39d35bb48036999b96d09168755d00e4d9a43d894f2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3373",
    "kind": "arxiv",
    "version": 1
  }
}