Pith Number

pith:VDYU3VJE

pith:2019:VDYU3VJERD7TH57W6KK5ZBJEMH

not attested not anchored not stored refs pending

The isolation of Luminous Blue Variables resembles aging B-type supergiants, not the most massive unevolved stars

Nathan Smith

arxiv:1908.06104 v1 · 2019-08-16 · astro-ph.SR · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VDYU3VJERD7TH57W6KK5ZBJEMH}

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	2026-07-05T00:01:03.503376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8f14dd52488ff33f7f6f295dc852461eafca1acc484ac9d16eb36e7f4d9458f

Aliases

arxiv: 1908.06104 · arxiv_version: 1908.06104v1 · doi: 10.48550/arxiv.1908.06104 · pith_short_12: VDYU3VJERD7T · pith_short_16: VDYU3VJERD7TH57W · pith_short_8: VDYU3VJE

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/VDYU3VJERD7TH57W6KK5ZBJEMH \
  | 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: a8f14dd52488ff33f7f6f295dc852461eafca1acc484ac9d16eb36e7f4d9458f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "932b110479de21b4a24be692556f861d3a1031645296efd6eaef476f79650f29",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-08-16T18:00:07Z",
    "title_canon_sha256": "a765dab356df3c16972ebc4de0153ef04410e4b1f26dc41ba63893112f1b1f0b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06104",
    "kind": "arxiv",
    "version": 1
  }
}