Pith Number

pith:OLT5XLJW

pith:2015:OLT5XLJWLCDNGCVFVTBKMOOZY6

not attested not anchored not stored refs pending

Spacetime invariants and their uses

Malcolm A.H. MacCallum

arxiv:1504.06857 v1 · 2015-04-26 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OLT5XLJWLCDNGCVFVTBKMOOZY6}

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.

Cited by

1 paper in Pith

Doubly regular black holes

Receipt and verification

First computed	2026-05-18T02:17:44.223196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72e7dbad365886d30aa5acc2a639d9c78ab2744e4e6b49bac618f5a452e425e7

Aliases

arxiv: 1504.06857 · arxiv_version: 1504.06857v1 · doi: 10.48550/arxiv.1504.06857 · pith_short_12: OLT5XLJWLCDN · pith_short_16: OLT5XLJWLCDNGCVF · pith_short_8: OLT5XLJW

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/OLT5XLJWLCDNGCVFVTBKMOOZY6 \
  | 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: 72e7dbad365886d30aa5acc2a639d9c78ab2744e4e6b49bac618f5a452e425e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f779de8beb2fef2e6b8e12e717645c86449eab5fb84265eb52149b3d6cdc5705",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2015-04-26T17:48:58Z",
    "title_canon_sha256": "600ab0a206f066f6e09b153e29c1a3bb27fa3ae778c18e9fe3b3121c43204be4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06857",
    "kind": "arxiv",
    "version": 1
  }
}