Pith Number

pith:N35E33TU

pith:2019:N35E33TUOGH6LPVUCJ3WICDMJB

not attested not anchored not stored refs pending

The collision between the Milky Way and Andromeda and the fate of their Supermassive Black Holes

Manuel Arca Sedda, Mario Spera, Riccardo Schiavi, Roberto Capuzzo Dolcetta

arxiv:1908.07278 v1 · 2019-08-20 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N35E33TUOGH6LPVUCJ3WICDMJB}

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	2026-07-05T00:48:17.758690Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6efa4dee74718fe5beb4127764086c484cdb44bb0cd3fea4566c8afb34263be7

Aliases

arxiv: 1908.07278 · arxiv_version: 1908.07278v1 · doi: 10.48550/arxiv.1908.07278 · pith_short_12: N35E33TUOGH6 · pith_short_16: N35E33TUOGH6LPVU · pith_short_8: N35E33TU

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/N35E33TUOGH6LPVUCJ3WICDMJB \
  | 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: 6efa4dee74718fe5beb4127764086c484cdb44bb0cd3fea4566c8afb34263be7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "261fca370b43b99eb2b8fb9141cf6184183972ccd7c0c546cbf522cce6b0b027",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-08-20T11:31:36Z",
    "title_canon_sha256": "c2d3621302ad4f9284852c452f718462b5e6e1534fc207e285e0eb4b05ae2bcd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07278",
    "kind": "arxiv",
    "version": 1
  }
}