Pith Number

pith:IEY27PPK

pith:2007:IEY27PPKCZR6KE6WPWFVVDMBLE

not attested not anchored not stored refs pending

Comparison of decision tree methods for finding active objects

Y. Zhang, Y. Zhao

arxiv:0708.4274 v1 · 2007-08-31 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IEY27PPKCZR6KE6WPWFVVDMBLE}

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	2026-05-18T04:24:52.070872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4131afbdea1663e513d67d8b5a8d81590c1f4691b635f2202ea110dd6654acc4

Aliases

arxiv: 0708.4274 · arxiv_version: 0708.4274v1 · doi: 10.48550/arxiv.0708.4274 · pith_short_12: IEY27PPKCZR6 · pith_short_16: IEY27PPKCZR6KE6W · pith_short_8: IEY27PPK

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/IEY27PPKCZR6KE6WPWFVVDMBLE \
  | 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: 4131afbdea1663e513d67d8b5a8d81590c1f4691b635f2202ea110dd6654acc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1bd01e364b3c7b77b49c2f76dc616e09668c1c4e398a438102b66cf8dd7d8c1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-08-31T06:30:49Z",
    "title_canon_sha256": "607290d7b9c764974930a257db61beb856b982cd91e0d4d313cfedb0d78e322a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0708.4274",
    "kind": "arxiv",
    "version": 1
  }
}