Pith Number

pith:PWRPKUVD

pith:2012:PWRPKUVDHZY6FSKUWTKZGEPFSW

not attested not anchored not stored refs pending

VLBI for Gravity Probe B. II. Monitoring of the Structure of the Reference Sources 3C 454.3, B2250+194, and B2252+172

D. E. Lebach, I. I. Shapiro, J. I. Lederman, M. F. Bietenholz, M. I. Ratner, N. Bartel, P. Luca, R. R. Ransom

arxiv:1204.4643 v1 · 2012-04-20 · 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{PWRPKUVDHZY6FSKUWTKZGEPFSW}

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	2026-05-18T01:57:48.102967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7da2f552a33e71e2c954b4d59311e5959ecd44816486fb6c970d16dddb4848b4

Aliases

arxiv: 1204.4643 · arxiv_version: 1204.4643v1 · doi: 10.48550/arxiv.1204.4643 · pith_short_12: PWRPKUVDHZY6 · pith_short_16: PWRPKUVDHZY6FSKU · pith_short_8: PWRPKUVD

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/PWRPKUVDHZY6FSKUWTKZGEPFSW \
  | 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: 7da2f552a33e71e2c954b4d59311e5959ecd44816486fb6c970d16dddb4848b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "858739d2ec180e52273765d84cd1b358aa23c64b29169a0e46cb8213fa263c7e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-04-20T14:18:37Z",
    "title_canon_sha256": "7d564bc5107b2c95218185dc591a68bc7f12b566b17ee6a19fde1c4f505748de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4643",
    "kind": "arxiv",
    "version": 1
  }
}