Pith Number

pith:PXRFFDCO

pith:2012:PXRFFDCO633CCU2FG7TOQIFTDG

not attested not anchored not stored refs pending

The date of interbreeding between Neandertals and modern humans

David Reich, Heng Li, Nick Patterson, Sriram Sankararaman, Svante P\"a\"abo

arxiv:1208.2238 v1 · 2012-08-10 · q-bio.PE · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PXRFFDCO633CCU2FG7TOQIFTDG}

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	2026-05-18T03:48:59.758720Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7de2528c4ef6f621534537e6e820b3199bd2b744f059a03a93dab52de3f6df66

Aliases

arxiv: 1208.2238 · arxiv_version: 1208.2238v1 · doi: 10.48550/arxiv.1208.2238 · pith_short_12: PXRFFDCO633C · pith_short_16: PXRFFDCO633CCU2F · pith_short_8: PXRFFDCO

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/PXRFFDCO633CCU2FG7TOQIFTDG \
  | 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: 7de2528c4ef6f621534537e6e820b3199bd2b744f059a03a93dab52de3f6df66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "314fcd48775565832120961dc8d7187139603690ba005b859cb6e9d1b0ed8346",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2012-08-10T18:15:01Z",
    "title_canon_sha256": "807388c4a4825023b4aca4052b7c43a2576dd82e391343065b2407b6b31f695c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2238",
    "kind": "arxiv",
    "version": 1
  }
}