Pith Number

pith:3C4NEVRK

pith:2007:3C4NEVRKDUCNY7JMXMU62XCFZI

not attested not anchored not stored refs pending

Solving the subset-sum problem with a light-based device

Mihai Oltean, Oana Muntean

arxiv:0708.1964 v1 · 2007-08-14 · cs.AR · cs.AI · cs.DC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3C4NEVRKDUCNY7JMXMU62XCFZI}

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	2026-05-18T01:33:32.969819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8b8d2562a1d04dc7d2cbb29ed5c45ca347d5ac1b0ea08a0ccabb680ad423aa4

Aliases

arxiv: 0708.1964 · arxiv_version: 0708.1964v1 · doi: 10.48550/arxiv.0708.1964 · pith_short_12: 3C4NEVRKDUCN · pith_short_16: 3C4NEVRKDUCNY7JM · pith_short_8: 3C4NEVRK

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/3C4NEVRKDUCNY7JMXMU62XCFZI \
  | 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: d8b8d2562a1d04dc7d2cbb29ed5c45ca347d5ac1b0ea08a0ccabb680ad423aa4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19009eb594fd56f4985c67672e66d396064cbf90f75c75f3e194db9af4d1c11b",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.DC"
    ],
    "license": "",
    "primary_cat": "cs.AR",
    "submitted_at": "2007-08-14T21:46:32Z",
    "title_canon_sha256": "a395d39cb3e1b560fa0575b61028659f194d55fa871ba4a8095ea3e25c17c1cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0708.1964",
    "kind": "arxiv",
    "version": 1
  }
}