Pith Number

pith:PWSUYPNZ

pith:2018:PWSUYPNZIYDRLU7LUDAFBGQNTT

not attested not anchored not stored refs pending

Clues about the scarcity of stripped-envelope stars from the evolutionary state of the sdO+Be binary system phi Persei

A. Schootemeijer, D. R. Gies, E. Zapartas, S. E. de Mink, Y. Gotberg

arxiv:1803.02379 v1 · 2018-03-06 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PWSUYPNZIYDRLU7LUDAFBGQNTT}

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	2026-05-18T00:10:02.585012Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7da54c3db9460715d3eba0c0509a0d9cef71a81fb9391eb4739dea9b193dd830

Aliases

arxiv: 1803.02379 · arxiv_version: 1803.02379v1 · doi: 10.48550/arxiv.1803.02379 · pith_short_12: PWSUYPNZIYDR · pith_short_16: PWSUYPNZIYDRLU7L · pith_short_8: PWSUYPNZ

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/PWSUYPNZIYDRLU7LUDAFBGQNTT \
  | 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: 7da54c3db9460715d3eba0c0509a0d9cef71a81fb9391eb4739dea9b193dd830

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ee27072a0cf7976b0aaa7f7cc574e470ed920411808275307046d3fb5ac887b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-03-06T19:07:02Z",
    "title_canon_sha256": "3451552d7c3883f31e205798589a11c813f78d7755e109668687e931231f4135"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.02379",
    "kind": "arxiv",
    "version": 1
  }
}