Pith Number

pith:6JAPZ5EA

pith:2010:6JAPZ5EAQMRAS6VNYIZL2QKKQE

not attested not anchored not stored refs pending

The dependence of the properties of optical fibres on length

C. L. Poppett, J. R. Allington-Smith

arxiv:1002.2575 v1 · 2010-02-12 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6JAPZ5EAQMRAS6VNYIZL2QKKQE}

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	2026-05-18T02:09:08.817400Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f240fcf4808322097aadc232bd414a813c78fa85d0fd625268ababb2da2b6944

Aliases

arxiv: 1002.2575 · arxiv_version: 1002.2575v1 · doi: 10.48550/arxiv.1002.2575 · pith_short_12: 6JAPZ5EAQMRA · pith_short_16: 6JAPZ5EAQMRAS6VN · pith_short_8: 6JAPZ5EA

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/6JAPZ5EAQMRAS6VNYIZL2QKKQE \
  | 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: f240fcf4808322097aadc232bd414a813c78fa85d0fd625268ababb2da2b6944

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f6de2183e4d541f13180f4a4f3d29f039907238d423de4e8e9b3dfdb1897b52",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2010-02-12T15:20:21Z",
    "title_canon_sha256": "4178bcda5019fc3967e85d0a045ad7649ba62b75408b13560ffc8ab006691716"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.2575",
    "kind": "arxiv",
    "version": 1
  }
}