Pith Number

pith:7ZXZ2RYQ

pith:2013:7ZXZ2RYQIJHDHRBUX5VCKBIXFB

not attested not anchored not stored refs pending

Parallel Chen-Han (PCH) Algorithm for Discrete Geodesics

Shi-Qing Xin, Xiang Ying, Ying He

arxiv:1305.1293 v1 · 2013-05-07 · cs.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7ZXZ2RYQIJHDHRBUX5VCKBIXFB}

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	2026-05-18T03:26:22.098519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe6f9d4710424e33c434bf6a250517287105432c9edaeba2c3cbbef3f39d6fc3

Aliases

arxiv: 1305.1293 · arxiv_version: 1305.1293v1 · doi: 10.48550/arxiv.1305.1293 · pith_short_12: 7ZXZ2RYQIJHD · pith_short_16: 7ZXZ2RYQIJHDHRBU · pith_short_8: 7ZXZ2RYQ

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/7ZXZ2RYQIJHDHRBUX5VCKBIXFB \
  | 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: fe6f9d4710424e33c434bf6a250517287105432c9edaeba2c3cbbef3f39d6fc3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "866643e8454500d9c71e21d2f442ac6cd43217aca1f398eb5bea286a5ec6b21b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2013-05-07T14:09:16Z",
    "title_canon_sha256": "78b26c9858a6847311460f0ed044a0f784a983dd27996564c92e1ac71add7b21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1293",
    "kind": "arxiv",
    "version": 1
  }
}