Pith Number

pith:6V7YDEGD

pith:1999:6V7YDEGDP77PJ46ERTT6ONRE3T

not attested not anchored not stored refs pending

The ALFA Laser and Analysis Tools

A. Eckart, A. Quirrenbach, M. Kasper, R. Davies, S. Rabien, T. Ott, W. Hackenberg

arxiv:astro-ph/9911031 v1 · 1999-11-03 · 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{6V7YDEGDP77PJ46ERTT6ONRE3T}

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	2026-07-04T14:17:17.077272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f57f8190c37ffef4f3c48ce7e73624dcc4f07c4bf3e4c7911674f7e9369487c8

Aliases

arxiv: astro-ph/9911031 · arxiv_version: astro-ph/9911031v1 · doi: 10.48550/arxiv.astro-ph/9911031 · pith_short_12: 6V7YDEGDP77P · pith_short_16: 6V7YDEGDP77PJ46E · pith_short_8: 6V7YDEGD

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/6V7YDEGDP77PJ46ERTT6ONRE3T \
  | 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: f57f8190c37ffef4f3c48ce7e73624dcc4f07c4bf3e4c7911674f7e9369487c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b53352370068f97f5b2dd515b1f2e0ae537d25a070fade6efb2b60908b330cf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-03T10:22:11Z",
    "title_canon_sha256": "b28be23b11e0a4ec3b3f872dda8b952887022708e2a702584d840721b5ea13e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911031",
    "kind": "arxiv",
    "version": 1
  }
}