Pith Number

pith:4XK4IAP6

pith:2013:4XK4IAP6FI7XAQQ7HCVKGKQXX6

not attested not anchored not stored refs pending

Problem of time and Hamiltonian reduction in the (2+2) formalism

Jong Hyuk Yoon

arxiv:1306.2375 v1 · 2013-06-10 · 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{4XK4IAP6FI7XAQQ7HCVKGKQXX6}

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	2026-05-18T03:21:21.196556Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5d5c401fe2a3f70421f38aaa32a17bfbd3ab8a77254f75af1acd5aa2ed09c77

Aliases

arxiv: 1306.2375 · arxiv_version: 1306.2375v1 · doi: 10.48550/arxiv.1306.2375 · pith_short_12: 4XK4IAP6FI7X · pith_short_16: 4XK4IAP6FI7XAQQ7 · pith_short_8: 4XK4IAP6

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/4XK4IAP6FI7XAQQ7HCVKGKQXX6 \
  | 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: e5d5c401fe2a3f70421f38aaa32a17bfbd3ab8a77254f75af1acd5aa2ed09c77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba8cb2a8dc6c9ae6fe0d463cac2cc8dca042b67f000f019033b09af2829a6246",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2013-06-10T22:40:03Z",
    "title_canon_sha256": "549e78ec71b143ea1f7464b377db8bb8e76838cf2b76b95209f00ebe945be752"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.2375",
    "kind": "arxiv",
    "version": 1
  }
}