Pith Number

pith:3C27LHIE

pith:2008:3C27LHIEBJYYWIA33L3DMELRGB

not attested not anchored not stored refs pending

Thump, ring: the sound of a bouncing ball

J. I. Katz

arxiv:0808.3278 v2 · 2008-08-24 · physics.pop-ph · 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{3C27LHIEBJYYWIA33L3DMELRGB}

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	2026-05-18T03:55:22.277493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8b5f59d040a718b201bdaf63611713053fe451d02b5f8cf172c207bc7c480e7

Aliases

arxiv: 0808.3278 · arxiv_version: 0808.3278v2 · doi: 10.48550/arxiv.0808.3278 · pith_short_12: 3C27LHIEBJYY · pith_short_16: 3C27LHIEBJYYWIA3 · pith_short_8: 3C27LHIE

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/3C27LHIEBJYYWIA33L3DMELRGB \
  | 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: d8b5f59d040a718b201bdaf63611713053fe451d02b5f8cf172c207bc7c480e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d248cf2a94c2b74bffe5cde1349622792139c6763adefe4d0a35b51df9a8786",
    "cross_cats_sorted": [
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2008-08-24T22:47:32Z",
    "title_canon_sha256": "53ce1e2d186f730fa4f00808554b5341160d33ed87c18d1587ae8a4b3649a1bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.3278",
    "kind": "arxiv",
    "version": 2
  }
}