Pith Number

pith:WDBQP5LN

pith:2025:WDBQP5LNRCZCCIZND6BN5T2JQT

not attested not anchored not stored refs pending

An extension of Dembo-Hammer's reduction algorithm for the 0-1 knapsack problem

Yang Yang

arxiv:2506.06138 v1 · 2025-06-06 · cs.CC · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WDBQP5LNRCZCCIZND6BN5T2JQT}

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	2026-07-05T11:17:26.389208Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0c307f56d88b221232d1f82decf4984e339ac7f271be6928f9f83bef994f954

Aliases

arxiv: 2506.06138 · arxiv_version: 2506.06138v1 · doi: 10.48550/arxiv.2506.06138 · pith_short_12: WDBQP5LNRCZC · pith_short_16: WDBQP5LNRCZCCIZN · pith_short_8: WDBQP5LN

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/WDBQP5LNRCZCCIZND6BN5T2JQT \
  | 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: b0c307f56d88b221232d1f82decf4984e339ac7f271be6928f9f83bef994f954

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b0459063b94242e2afd485a89e769f802c8c49cae9a337b802d8d215abde2eb",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2025-06-06T14:55:12Z",
    "title_canon_sha256": "6080a3e96b084ed23b345eb550ab225f13ecd73dfc0a098e74999c91d01cb83e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.06138",
    "kind": "arxiv",
    "version": 1
  }
}