Pith Number

pith:7KZ57ZNX

pith:2018:7KZ57ZNXQVCG45DMOSQHU7W4VW

not attested not anchored not stored refs pending

Moonfalls: Collisions between the Earth and its past moons

Christoph Burger, Christoph Schafer, Hagai B. Perets, Uri Malamud

arxiv:1805.00019 v1 · 2018-04-30 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7KZ57ZNXQVCG45DMOSQHU7W4VW}

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	2026-05-18T00:11:05.184966Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fab3dfe5b785446e746c74a07a7edcad85a92603a71a1e74ccfb2008317dbbdc

Aliases

arxiv: 1805.00019 · arxiv_version: 1805.00019v1 · doi: 10.48550/arxiv.1805.00019 · pith_short_12: 7KZ57ZNXQVCG · pith_short_16: 7KZ57ZNXQVCG45DM · pith_short_8: 7KZ57ZNX

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/7KZ57ZNXQVCG45DMOSQHU7W4VW \
  | 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: fab3dfe5b785446e746c74a07a7edcad85a92603a71a1e74ccfb2008317dbbdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c102619e147c271cde4231cf9d9ed93d97245741ae7737b273fe37774adee3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-04-30T18:00:01Z",
    "title_canon_sha256": "245f95984369ff4b3b93fc4bd07ba8792de7bc2443c3c2b3d200a60ad58ad21d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.00019",
    "kind": "arxiv",
    "version": 1
  }
}