Pith Number

pith:3P2OBTSC

pith:1999:3P2OBTSCNKU3S7TRQRBIRHFQE6

not attested not anchored not stored refs pending

Space Positronium Detection by Radio Measurements

DAPNIA, DSM, France), Gif-sur Yvette Cedex, Moscow, Ph. Durouchoux (2), Russia; (2) CE-Saclay, Service d'Astrophysique, V. Burdyuzha (1), V. Kauts (1) ((1) Astro Space Center Lebedev Physical Institute of Russian Academy of Sciences

arxiv:astro-ph/9912550 v1 · 1999-12-30 · astro-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{3P2OBTSCNKU3S7TRQRBIRHFQE6}

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	2026-07-04T14:17:27.699061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbf4e0ce426aa9b97e718442889cb027a8bb7126e26dd3eeec5a3727bfd6a74a

Aliases

arxiv: astro-ph/9912550 · arxiv_version: astro-ph/9912550v1 · doi: 10.48550/arxiv.astro-ph/9912550 · pith_short_12: 3P2OBTSCNKU3 · pith_short_16: 3P2OBTSCNKU3S7TR · pith_short_8: 3P2OBTSC

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/3P2OBTSCNKU3S7TRQRBIRHFQE6 \
  | 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: dbf4e0ce426aa9b97e718442889cb027a8bb7126e26dd3eeec5a3727bfd6a74a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63bed12630521c052a43c2552c3596819b6fb18e3d8c2626444dda8eb44aa54c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-30T08:59:16Z",
    "title_canon_sha256": "e8f55c9ebcc1e01e4dc8e13f086c029aa615aa9bf66cab9fc4e06283e648c937"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912550",
    "kind": "arxiv",
    "version": 1
  }
}