Pith Number

pith:2B4MDWLL

pith:2017:2B4MDWLL4C3TPNGXZAN6M3MBU6

not attested not anchored not stored refs pending

Serendipitous discovery of quadruply-imaged quasars: two diamonds

(2) MIT Kavli Institute, (3) Universidad Andres Bello), John R. Lucey (1), Paul L. Schechter (2), Russell J. Smith (1), Timo Anguita (3) ((1) Durham

arxiv:1711.02674 v2 · 2017-11-07 · astro-ph.GA

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

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	2026-05-18T00:22:57.951183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d078c1d96be0b737b4d7c81be66d81a7a47ba4c5491ba953e6f69d8c4af69567

Aliases

arxiv: 1711.02674 · arxiv_version: 1711.02674v2 · doi: 10.48550/arxiv.1711.02674 · pith_short_12: 2B4MDWLL4C3T · pith_short_16: 2B4MDWLL4C3TPNGX · pith_short_8: 2B4MDWLL

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/2B4MDWLL4C3TPNGXZAN6M3MBU6 \
  | 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: d078c1d96be0b737b4d7c81be66d81a7a47ba4c5491ba953e6f69d8c4af69567

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ffdd1b707208c6e202c0ae9f1dcbdcfe001cf6cd322d3b24e1f1276c1bddc17",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-11-07T19:00:03Z",
    "title_canon_sha256": "9aa98cd3e51a25a6247740f804d41f68a482008e4965982efd40a5077e3b23b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.02674",
    "kind": "arxiv",
    "version": 2
  }
}