Pith Number

pith:XWKT3GQT

pith:2020:XWKT3GQTHUJO2XWDZPADLDEIY4

not attested not anchored not stored refs pending

Alone but not lonely: Observational evidence that binary interaction is always required to form hot subdwarf stars

Andrzej S. Baran, Ingrid Pelisoli, Joris Vos, Stephan Geier, Veronika Schaffenroth

arxiv:2008.07522 v1 · 2020-08-17 · 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{XWKT3GQTHUJO2XWDZPADLDEIY4}

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	2026-07-05T01:44:42.435992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd953d9a133d12ed5ec3cbc0358c88c72d7f1b2950f6c8f708f60fc0d9c51b32

Aliases

arxiv: 2008.07522 · arxiv_version: 2008.07522v1 · doi: 10.48550/arxiv.2008.07522 · pith_short_12: XWKT3GQTHUJO · pith_short_16: XWKT3GQTHUJO2XWD · pith_short_8: XWKT3GQT

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/XWKT3GQTHUJO2XWDZPADLDEIY4 \
  | 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: bd953d9a133d12ed5ec3cbc0358c88c72d7f1b2950f6c8f708f60fc0d9c51b32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c843b9c424a51e43e49bed3fe90d03f77656698b954e14b014f896fbddd6caba",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-08-17T17:59:29Z",
    "title_canon_sha256": "86647c55806ce14c2a214e8e6e2ce31d977a6f761c2d594c289c5bb6c671f392"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.07522",
    "kind": "arxiv",
    "version": 1
  }
}