Pith Number

pith:5HBPG66D

pith:2018:5HBPG66D577UR4P3VWUZBKMIEH

not attested not anchored not stored refs pending

Approximation algorithms for the vertex-weighted grade-of-service Steiner tree problem

Alon Efrat, Faryad Darabi Sahneh, Richard Spence, Spencer Krieger, Stephen Kobourov

arxiv:1811.11700 v2 · 2018-11-28 · 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{5HBPG66D577UR4P3VWUZBKMIEH}

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	2026-05-17T23:47:02.446574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9c2f37bc3efff48f1fbada990a98821f202818e4748f142d0850db051499bd5

Aliases

arxiv: 1811.11700 · arxiv_version: 1811.11700v2 · doi: 10.48550/arxiv.1811.11700 · pith_short_12: 5HBPG66D577U · pith_short_16: 5HBPG66D577UR4P3 · pith_short_8: 5HBPG66D

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/5HBPG66D577UR4P3VWUZBKMIEH \
  | 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: e9c2f37bc3efff48f1fbada990a98821f202818e4748f142d0850db051499bd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "992e6d5d5b3f9b216fce0a5bcb8270fea9cdc1e240fd0fc3e275e47af0e7a7d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-11-28T17:37:13Z",
    "title_canon_sha256": "bd4a40f37437e3b7c3ad142ff8a2f937e42387dae5205e688ad73396c79017af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.11700",
    "kind": "arxiv",
    "version": 2
  }
}