Pith Number

pith:4JEY5CHH

pith:2015:4JEY5CHHPGABYQVX2F5GLJGMDD

not attested not anchored not stored refs pending

Blocking optimal arborescences

Attila Bern\'ath, Gyula Pap

arxiv:1506.05677 v1 · 2015-06-18 · math.CO · 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{4JEY5CHHPGABYQVX2F5GLJGMDD}

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	2026-05-18T01:44:10.036603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2498e88e779801c42b7d17a65a4cc18f7c73ba3954309939825e7ad8ef34070

Aliases

arxiv: 1506.05677 · arxiv_version: 1506.05677v1 · doi: 10.48550/arxiv.1506.05677 · pith_short_12: 4JEY5CHHPGAB · pith_short_16: 4JEY5CHHPGABYQVX · pith_short_8: 4JEY5CHH

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/4JEY5CHHPGABYQVX2F5GLJGMDD \
  | 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: e2498e88e779801c42b7d17a65a4cc18f7c73ba3954309939825e7ad8ef34070

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ab68429e23b2b3df4d4cfd50879d252a9275b227eeb23a854749136c6c4ed7f",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-06-18T13:51:29Z",
    "title_canon_sha256": "25278567b5bf7bea11fde05103558ba7f00ee4f553d2b87ebbd0a31ea72855bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.05677",
    "kind": "arxiv",
    "version": 1
  }
}