Pith Number

pith:DSQOZ2HC

pith:2011:DSQOZ2HCSRFD7AUSX5NK3NYY7E

not attested not anchored not stored refs pending

Could M31 be the result of a major merger?

Fran\c{c}ois Hammer, Hector Flores, Jianling Wang, Mathieu Puech, Sylvain Fouquet, Yang-Bin Yang

arxiv:1110.5727 v1 · 2011-10-26 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DSQOZ2HCSRFD7AUSX5NK3NYY7E}

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	2026-05-18T02:00:03.738231Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ca0ece8e2944a3f8292bf5aadb718f9142040fa27333eddbc264d613fcbf5de

Aliases

arxiv: 1110.5727 · arxiv_version: 1110.5727v1 · doi: 10.48550/arxiv.1110.5727 · pith_short_12: DSQOZ2HCSRFD · pith_short_16: DSQOZ2HCSRFD7AUS · pith_short_8: DSQOZ2HC

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/DSQOZ2HCSRFD7AUSX5NK3NYY7E \
  | 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: 1ca0ece8e2944a3f8292bf5aadb718f9142040fa27333eddbc264d613fcbf5de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96026d8f3a634b435e4cf1eb0295a280f02d44903625276d0d38cc5a1365dc17",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-10-26T08:00:02Z",
    "title_canon_sha256": "6f15bed1ef9deb8a289d42f8c1557f970a215b13b82ecdce441a1410f75ea2f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.5727",
    "kind": "arxiv",
    "version": 1
  }
}