Pith Number

pith:Y5426Z5G

pith:2004:Y5426Z5G5N7QVWF3NMEQQSUGZS

not attested not anchored not stored refs pending

Trans-sonic propeller stage

M.E. Prokhorov (Sternberg Astronomical Institute), S.B. Popov

arxiv:astro-ph/0412562 v1 · 2004-12-21 · 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{Y5426Z5G5N7QVWF3NMEQQSUGZS}

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	2026-05-18T01:40:34.633921Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c779af67a6eb7f0ad8bb6b09084a86cca1e348176e8f0217faf1abd2a4dd5ef6

Aliases

arxiv: astro-ph/0412562 · arxiv_version: astro-ph/0412562v1 · doi: 10.48550/arxiv.astro-ph/0412562 · pith_short_12: Y5426Z5G5N7Q · pith_short_16: Y5426Z5G5N7QVWF3 · pith_short_8: Y5426Z5G

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/Y5426Z5G5N7QVWF3NMEQQSUGZS \
  | 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: c779af67a6eb7f0ad8bb6b09084a86cca1e348176e8f0217faf1abd2a4dd5ef6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f6138a940bcef2dd4f07f1b5258225405478ebb93f0640701de4e0765ccbbaa",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-12-21T14:20:47Z",
    "title_canon_sha256": "ae2a27e54b0a46633edfc4be4f3ffe696fe9d3b3d74e6ab2e6581e363585f8a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0412562",
    "kind": "arxiv",
    "version": 1
  }
}