Pith Number

pith:UBWESU4M

pith:2014:UBWESU4MNZXSJ3ESEFB74YQOXV

not attested not anchored not stored refs pending

Signatures of the M31-M32 Galactic Collision

Abraham Loeb, Laura Blecha, Marion Dierickx

arxiv:1405.3990 v3 · 2014-05-15 · astro-ph.GA · 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{UBWESU4MNZXSJ3ESEFB74YQOXV}

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	2026-05-18T01:43:11.933161Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a06c49538c6e6f24ec922143fe620ebd504c16268cb51e9ce19e69e2fcb22d19

Aliases

arxiv: 1405.3990 · arxiv_version: 1405.3990v3 · doi: 10.48550/arxiv.1405.3990 · pith_short_12: UBWESU4MNZXS · pith_short_16: UBWESU4MNZXSJ3ES · pith_short_8: UBWESU4M

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/UBWESU4MNZXSJ3ESEFB74YQOXV \
  | 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: a06c49538c6e6f24ec922143fe620ebd504c16268cb51e9ce19e69e2fcb22d19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d69241bebc7af6ce0c308d10b6fe073561db416b9dd524e2da742ed1c76961f",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2014-05-15T20:00:19Z",
    "title_canon_sha256": "beb3692121fb500404ebc89d588bf5c52fe4edb29296da3618f22681583c3f44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.3990",
    "kind": "arxiv",
    "version": 3
  }
}