Pith Number

pith:L6EM3ITO

pith:1999:L6EM3ITOHDADPQVWZEHUHNC677

not attested not anchored not stored refs pending

Unbiased image reconstruction as an inverse problem

Aarhus University, Denmark), F. P. Pijpers (TAC, IfA

arxiv:astro-ph/9904075 v1 · 1999-04-06 · 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{L6EM3ITOHDADPQVWZEHUHNC677}

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	2026-05-18T01:07:36.482960Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f88cda26e38c037c2b6c90f43b45efffa5f4929c6bdc1c4e2bd1dc353126374

Aliases

arxiv: astro-ph/9904075 · arxiv_version: astro-ph/9904075v1 · doi: 10.48550/arxiv.astro-ph/9904075 · pith_short_12: L6EM3ITOHDAD · pith_short_16: L6EM3ITOHDADPQVW · pith_short_8: L6EM3ITO

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/L6EM3ITOHDADPQVWZEHUHNC677 \
  | 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: 5f88cda26e38c037c2b6c90f43b45efffa5f4929c6bdc1c4e2bd1dc353126374

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27ee3b1d4f6b0607ae563972dc144b167ee651ebd99f69167400fd19dd074357",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-06T13:02:19Z",
    "title_canon_sha256": "422bde2e940b5c56427f5ba995a4b96c62545d5f22e656e51401ccb5d23aa273"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904075",
    "kind": "arxiv",
    "version": 1
  }
}