Pith Number

pith:5J4PJQS4

pith:2011:5J4PJQS47AZC2XYVKQORBOUN6E

not attested not anchored not stored refs pending

The firefighter problem with more than one firefighter on trees

Bernard Ries, Cristina Bazgan, Morgan Chopin

arxiv:1110.0341 v1 · 2011-10-03 · cs.DM · 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{5J4PJQS47AZC2XYVKQORBOUN6E}

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	2026-05-18T04:11:50.167600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea78f4c25cf8322d5f15541d10ba8df11413a39b3bd000505ec948e584a291d3

Aliases

arxiv: 1110.0341 · arxiv_version: 1110.0341v1 · doi: 10.48550/arxiv.1110.0341 · pith_short_12: 5J4PJQS47AZC · pith_short_16: 5J4PJQS47AZC2XYV · pith_short_8: 5J4PJQS4

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/5J4PJQS47AZC2XYVKQORBOUN6E \
  | 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: ea78f4c25cf8322d5f15541d10ba8df11413a39b3bd000505ec948e584a291d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e90955154dbc40860ad7b5eaa5625f2d9887a09483e9f83db72e530ed6eae169",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2011-10-03T12:36:58Z",
    "title_canon_sha256": "9c27d8dd413c9bf31905217997a725f0cfb53722535babe48097bd2c138fcbdc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.0341",
    "kind": "arxiv",
    "version": 1
  }
}