Pith Number

pith:UC5JTKYP

pith:2023:UC5JTKYPLNOCBM5GCGV3DNCSNQ

not attested not anchored not stored refs pending

2-Approximation for Prize-Collecting Steiner Forest

Ali Ahmadi, Iman Gholami, Mohammad Mahdavi, MohammadTaghi Hajiaghayi, Peyman Jabbarzade

arxiv:2309.05172 v2 · 2023-09-11 · 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{UC5JTKYPLNOCBM5GCGV3DNCSNQ}

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	2026-07-05T08:16:07.479626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0ba99ab0f5b5c20b3a611abb1b4526c3e428422956b47c39ac1833cdcb5f57e

Aliases

arxiv: 2309.05172 · arxiv_version: 2309.05172v2 · doi: 10.48550/arxiv.2309.05172 · pith_short_12: UC5JTKYPLNOC · pith_short_16: UC5JTKYPLNOCBM5G · pith_short_8: UC5JTKYP

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/UC5JTKYPLNOCBM5GCGV3DNCSNQ \
  | 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: a0ba99ab0f5b5c20b3a611abb1b4526c3e428422956b47c39ac1833cdcb5f57e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d69b920add126642f6fc64454a5cf6043df08151580abbbfdab4736bac72a03",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2023-09-11T00:01:44Z",
    "title_canon_sha256": "957cfaef0e6f12babc839ae04fe4e8a964b42aa44f68d1e700942ceee7e685c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2309.05172",
    "kind": "arxiv",
    "version": 2
  }
}