Pith Number

pith:NZU6CNDN

pith:2009:NZU6CNDN7DN7K2MXC4UZWC3IQS

not attested not anchored not stored refs pending

Sphere penetration by impact in a granular medium: A collisional process

Antoine Seguin, Jerome Crassous, Philippe Gondret, Yann Bertho

arxiv:0907.3453 v2 · 2009-07-20 · cond-mat.soft

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NZU6CNDN7DN7K2MXC4UZWC3IQS}

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	2026-05-18T03:38:03.043177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e69e1346df8dbf5699717299b0b6884a9ba8ee993ec8cd2883a89658602fb4f

Aliases

arxiv: 0907.3453 · arxiv_version: 0907.3453v2 · doi: 10.48550/arxiv.0907.3453 · pith_short_12: NZU6CNDN7DN7 · pith_short_16: NZU6CNDN7DN7K2MX · pith_short_8: NZU6CNDN

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/NZU6CNDN7DN7K2MXC4UZWC3IQS \
  | 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: 6e69e1346df8dbf5699717299b0b6884a9ba8ee993ec8cd2883a89658602fb4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1332e8b2b48b25d1ba578639d37f9f004cf02a4e58fe22eb01357c82f32dc8d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2009-07-20T17:39:09Z",
    "title_canon_sha256": "f501c62b0c757ea913467ff0fcd0053161f1ece1ccf99cf94ce5881df0bebd3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3453",
    "kind": "arxiv",
    "version": 2
  }
}