Pith Number

pith:ISXFGQOH

pith:2014:ISXFGQOHX3MHTI55GM7MVLBZKQ

not attested not anchored not stored refs pending

A 4/3-approximation algorithm for finding a spanning tree to maximize its internal vertices

Daming Zhu, Xingfu Li

arxiv:1409.3700 v1 · 2014-09-12 · 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{ISXFGQOHX3MHTI55GM7MVLBZKQ}

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	2026-05-18T02:42:54.785271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44ae5341c7bed879a3bd333ecaac39541a39c0ae7fae0151c78a798264572046

Aliases

arxiv: 1409.3700 · arxiv_version: 1409.3700v1 · doi: 10.48550/arxiv.1409.3700 · pith_short_12: ISXFGQOHX3MH · pith_short_16: ISXFGQOHX3MHTI55 · pith_short_8: ISXFGQOH

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/ISXFGQOHX3MHTI55GM7MVLBZKQ \
  | 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: 44ae5341c7bed879a3bd333ecaac39541a39c0ae7fae0151c78a798264572046

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e16baa2e5bd05e67eab8ed7191f535ab3026bd01d464f2f86ba0fde45186beef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2014-09-12T11:20:10Z",
    "title_canon_sha256": "33fb7d92b7b5ed400e099bf40917d5ecfc82956b2ca13f260a5621587ee77388"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.3700",
    "kind": "arxiv",
    "version": 1
  }
}