Pith Number

pith:TM77CZLS

pith:2019:TM77CZLSWOER3ZOJPWCZR7ICOM

not attested not anchored not stored refs pending

Covering a tree with rooted subtrees

Daniel Marx, Lin Chen

arxiv:1902.08218 v1 · 2019-02-21 · 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{TM77CZLSWOER3ZOJPWCZR7ICOM}

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	2026-05-17T23:52:57.974590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9b3ff16572b3891de5c97d8598fd027310cb45d39156d89d139117903ec7f451

Aliases

arxiv: 1902.08218 · arxiv_version: 1902.08218v1 · doi: 10.48550/arxiv.1902.08218 · pith_short_12: TM77CZLSWOER · pith_short_16: TM77CZLSWOER3ZOJ · pith_short_8: TM77CZLS

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/TM77CZLSWOER3ZOJPWCZR7ICOM \
  | 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: 9b3ff16572b3891de5c97d8598fd027310cb45d39156d89d139117903ec7f451

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "731fb256b1d31de89a64a1f4ea27f0e2fddcdfe4a1e39231257c260ff02e4052",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-02-21T19:09:46Z",
    "title_canon_sha256": "8f102c2a46edce347472ba11502e32c4280cd9159d0d492f61913d5a8a2779ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.08218",
    "kind": "arxiv",
    "version": 1
  }
}