Pith Number

pith:BPYS3DHI

pith:2007:BPYS3DHITPMBB45JTNQTOAJKDH

not attested not anchored not stored refs pending

Scaling and dynamics of sphere and disk impact into granular media

Daniel I Goldman, Paul B. Umbanhowar

arxiv:0709.4043 v1 · 2007-09-25 · cond-mat.soft · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BPYS3DHITPMBB45JTNQTOAJKDH}

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	2026-07-04T17:05:52.104029Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bf12d8ce89bd810f3a99b6137012a19cf10821b385a7dd8be79d146e46f5b94

Aliases

arxiv: 0709.4043 · arxiv_version: 0709.4043v1 · doi: 10.48550/arxiv.0709.4043 · pith_short_12: BPYS3DHITPMB · pith_short_16: BPYS3DHITPMBB45J · pith_short_8: BPYS3DHI

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/BPYS3DHITPMBB45JTNQTOAJKDH \
  | 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: 0bf12d8ce89bd810f3a99b6137012a19cf10821b385a7dd8be79d146e46f5b94

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea11e012a9b4b6c49e06e911970f8116853c4ad150ef7674432b0f0487d7289e",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2007-09-25T21:29:06Z",
    "title_canon_sha256": "2f55869937b3d84fbe74088932a3d4d112f45af057524f2de049e0607baac669"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.4043",
    "kind": "arxiv",
    "version": 1
  }
}