Pith Number

pith:KNUBK4QZ

pith:2018:KNUBK4QZB4AVSRCO4VFBOIBF27

not attested not anchored not stored refs pending

Multiple shadows from distorted static black holes

Alexander Wittig, Jai Grover, Jutta Kunz, Petya Nedkova, Stoytcho Yazadjiev

arxiv:1802.03062 v1 · 2018-02-08 · gr-qc · astro-ph.HE

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.

Cited by

1 paper in Pith

Analytic thin disks and rings in a class of nonasymptotically flat static spacetimes

Receipt and verification

First computed	2026-05-18T00:17:38.803888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53681572190f0159444ee54a172025d7c125d18381f873dfb3be56bda9c98ccf

Aliases

arxiv: 1802.03062 · arxiv_version: 1802.03062v1 · doi: 10.48550/arxiv.1802.03062 · pith_short_12: KNUBK4QZB4AV · pith_short_16: KNUBK4QZB4AVSRCO · pith_short_8: KNUBK4QZ

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/KNUBK4QZB4AVSRCO4VFBOIBF27 \
  | 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: 53681572190f0159444ee54a172025d7c125d18381f873dfb3be56bda9c98ccf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64687162fb07005a0b95945761f655294bcef0c7472278ac69b178799589dff0",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-02-08T22:10:04Z",
    "title_canon_sha256": "801f5a62b4f5dad2a12ae73174ecb175acaa2abe26f2cde70503332409fccf86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03062",
    "kind": "arxiv",
    "version": 1
  }
}