Pith Number

pith:627VNVPD

pith:2000:627VNVPDFHGISCOGN6RVAX2YGN

not attested not anchored not stored refs pending

Slow light

Kirk T. McDonald

arxiv:physics/0007097 v2 · 2000-07-30 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{627VNVPDFHGISCOGN6RVAX2YGN}

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	2026-07-04T16:22:13.668301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6bf56d5e329cc8909c66fa3505f5833621ddda33eaed259fd00fc382cc45b24

Aliases

arxiv: physics/0007097 · arxiv_version: physics/0007097v2 · doi: 10.48550/arxiv.physics/0007097 · pith_short_12: 627VNVPDFHGI · pith_short_16: 627VNVPDFHGISCOG · pith_short_8: 627VNVPD

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/627VNVPDFHGISCOGN6RVAX2YGN \
  | 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: f6bf56d5e329cc8909c66fa3505f5833621ddda33eaed259fd00fc382cc45b24

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34d54870bd8c24e0a4096d24f4c9d0918dd219d0aad3cf1d21e42e4e6596fa1d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.optics",
    "submitted_at": "2000-07-30T01:57:10Z",
    "title_canon_sha256": "c9a7e9635c7a387244687666086a6f9cff379b9c720e5180886a31202fed2dcf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0007097",
    "kind": "arxiv",
    "version": 2
  }
}