Pith Number

pith:KBTGM2I4

pith:2012:KBTGM2I4UP3XBZDMKEV42L5IMR

not attested not anchored not stored refs pending

Normal Collisions of Spheres: A Literature Survey on Available Experiments

Carsten G\"uttler, Daniel Hei{\ss}elmann, J\"urgen Blum, Sebastiaan Krijt

arxiv:1204.0001 v2 · 2012-03-30 · physics.class-ph · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KBTGM2I4UP3XBZDMKEV42L5IMR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:24:41.911163Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

506666691ca3f770e46c512bcd2fa86469af24268f59ce644e1cf3dcc35b2447

Aliases

arxiv: 1204.0001 · arxiv_version: 1204.0001v2 · doi: 10.48550/arxiv.1204.0001 · pith_short_12: KBTGM2I4UP3X · pith_short_16: KBTGM2I4UP3XBZDM · pith_short_8: KBTGM2I4

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/KBTGM2I4UP3XBZDMKEV42L5IMR \
  | 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: 506666691ca3f770e46c512bcd2fa86469af24268f59ce644e1cf3dcc35b2447

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07bf25e34f04603e4e21c51bd538497dcd2b02046a4bbac150c803fd350a9a37",
    "cross_cats_sorted": [
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2012-03-30T06:17:30Z",
    "title_canon_sha256": "c1137e521c954ed20d25b5ed500e33cc278e85f73f935a903f71a2857ccd47fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0001",
    "kind": "arxiv",
    "version": 2
  }
}