Pith Number

pith:DOYFTGES

pith:2020:DOYFTGESLIL3EOALCEM2B2YYMF

not attested not anchored not stored refs pending

Surprising Variability of the Planetary Nebula IC 4997 = QV Sge

G.V. Komissarova, M.A. Burlak, N.P. Ikonnikova, V.F. Esipov, V.I. Shenavrin, V.P. Arkhipova

arxiv:2002.10005 v1 · 2020-02-23 · astro-ph.SR · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DOYFTGESLIL3EOALCEM2B2YYMF}

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	2026-07-05T01:29:54.418849Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb05998925a17b2380b1119a0eb18616978ba2bddb38025e0877c379786448b

Aliases

arxiv: 2002.10005 · arxiv_version: 2002.10005v1 · doi: 10.48550/arxiv.2002.10005 · pith_short_12: DOYFTGESLIL3 · pith_short_16: DOYFTGESLIL3EOAL · pith_short_8: DOYFTGES

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/DOYFTGESLIL3EOALCEM2B2YYMF \
  | 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: 1bb05998925a17b2380b1119a0eb18616978ba2bddb38025e0877c379786448b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "373be966eb9acdbe28fe614d06a56934e7df3d60b719af1cbc44807122253e57",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-02-23T22:47:54Z",
    "title_canon_sha256": "d7c53e35c78b87ee1173ccb8b339202c581f8e133688cbc2ebb15ea7d41dc544"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.10005",
    "kind": "arxiv",
    "version": 1
  }
}