Pith Number

pith:P4U7NIU2

pith:2013:P4U7NIU2YUUVFA6Q6FYPV75BB3

not attested not anchored not stored refs pending

Analysis and interpretation of the Cramer-Rao lower-bound in astrometry: One dimensional case

Jorge Silva, Rene Mendez, Rodrigo Lobos

arxiv:1304.6361 v1 · 2013-04-23 · astro-ph.IM · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P4U7NIU2YUUVFA6Q6FYPV75BB3}

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	2026-05-18T01:50:23.021928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f29f6a29ac5295283d0f170faffa10ee2bbde2a35a9c8f83d9974d75adb45d3

Aliases

arxiv: 1304.6361 · arxiv_version: 1304.6361v1 · doi: 10.48550/arxiv.1304.6361 · pith_short_12: P4U7NIU2YUUV · pith_short_16: P4U7NIU2YUUVFA6Q · pith_short_8: P4U7NIU2

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/P4U7NIU2YUUVFA6Q6FYPV75BB3 \
  | 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: 7f29f6a29ac5295283d0f170faffa10ee2bbde2a35a9c8f83d9974d75adb45d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f90f6d3d25987ef1ab93f73dda8530a3b48c7e85d41cdc2f4d158ed9e5175f4",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-04-23T17:44:17Z",
    "title_canon_sha256": "9f003f29656498f0dafd80097851c3146c364beb0ee3c6aee797e365e26ae3e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.6361",
    "kind": "arxiv",
    "version": 1
  }
}