Pith Number

pith:MDDQYASH

pith:2007:MDDQYASHEZUEHXI4ITAOPGRJTK

not attested not anchored not stored refs pending

Response of an impacting hertzian contact to an order-2 subharmonic excitation : theory and experiments

Emmanuel Rigaud (LTDS), Jo\"el Perret-Liaudet (LTDS)

arxiv:physics/0701066 v1 · 2007-01-05 · physics.class-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{MDDQYASHEZUEHXI4ITAOPGRJTK}

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	2026-05-18T01:09:14.696650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60c70c0247266843dd1c44c0e79a299aab20a21cbf92aad52c1d2fc56ad382f9

Aliases

arxiv: physics/0701066 · arxiv_version: physics/0701066v1 · doi: 10.48550/arxiv.physics/0701066 · pith_short_12: MDDQYASHEZUE · pith_short_16: MDDQYASHEZUEHXI4 · pith_short_8: MDDQYASH

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/MDDQYASHEZUEHXI4ITAOPGRJTK \
  | 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: 60c70c0247266843dd1c44c0e79a299aab20a21cbf92aad52c1d2fc56ad382f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08adef1b4df5dccba5a7807da1b85b70b0ab72c2c6c9c65bb96294b5d5a95a62",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2007-01-05T15:05:46Z",
    "title_canon_sha256": "d917316953691184a02bcbf4f80e97d5e9984d61760b8f8b91b71b9896c5706c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0701066",
    "kind": "arxiv",
    "version": 1
  }
}