Pith Number

pith:7C4D4UD6

pith:2009:7C4D4UD6DX4HM6EQO4NY7U2DCF

not attested not anchored not stored refs pending

Hypergraphic LP Relaxations for Steiner Trees

David Pritchard, Deeparnab Chakrabarty, Jochen Koenemann

arxiv:0910.0281 v2 · 2009-10-01 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7C4D4UD6DX4HM6EQO4NY7U2DCF}

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	2026-05-18T02:11:35.122092Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8b83e507e1df8767890771b8fd3431175c61f545319e644d8c3f8cc1b1d06a1

Aliases

arxiv: 0910.0281 · arxiv_version: 0910.0281v2 · doi: 10.48550/arxiv.0910.0281 · pith_short_12: 7C4D4UD6DX4H · pith_short_16: 7C4D4UD6DX4HM6EQ · pith_short_8: 7C4D4UD6

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/7C4D4UD6DX4HM6EQO4NY7U2DCF \
  | 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: f8b83e507e1df8767890771b8fd3431175c61f545319e644d8c3f8cc1b1d06a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bada096577e06d1930c8aa1e23692de3d35b2c2a2705a3062d6baf95a880f4d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2009-10-01T21:57:06Z",
    "title_canon_sha256": "220e9b04a2ecf9e57d6a2304098a3ac81e6d54c2e569003bb2edaf05674e506d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.0281",
    "kind": "arxiv",
    "version": 2
  }
}