Pith Number

pith:WCAKIAQT

pith:2011:WCAKIAQTHNCCIWEBAGJGCTF2JX

not attested not anchored not stored refs pending

Who has seen a free photon?

Hayato Saigo, Izumi Ojima

arxiv:1101.5782 v1 · 2011-01-30 · physics.gen-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{WCAKIAQTHNCCIWEBAGJGCTF2JX}

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	2026-05-18T04:30:24.820512Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b080a402133b442458810192614cba4dda4758c31d12363d86255bf7df27aa2e

Aliases

arxiv: 1101.5782 · arxiv_version: 1101.5782v1 · doi: 10.48550/arxiv.1101.5782 · pith_short_12: WCAKIAQTHNCC · pith_short_16: WCAKIAQTHNCCIWEB · pith_short_8: WCAKIAQT

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/WCAKIAQTHNCCIWEBAGJGCTF2JX \
  | 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: b080a402133b442458810192614cba4dda4758c31d12363d86255bf7df27aa2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "658d18db8f08ef578f75fc07b741aaa98d5d9639bfa16abba8032e10d422b4d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2011-01-30T16:20:51Z",
    "title_canon_sha256": "c6d30d55530589131f41759917fc1b7284db4f8443944601bd185dbc86a87b8b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.5782",
    "kind": "arxiv",
    "version": 1
  }
}