Pith Number

pith:45XUDCMP

pith:2013:45XUDCMPYOFGAL3WL2TYIFXM6I

not attested not anchored not stored refs pending

Greedy algorithms and poset matroids

Luca Ferrari

arxiv:1306.3797 v1 · 2013-06-17 · 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{45XUDCMPYOFGAL3WL2TYIFXM6I}

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	2026-05-18T03:20:46.406363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e76f41898fc38a602f765ea78416ecf215c2f03a5229296409a5bf2c049b97e9

Aliases

arxiv: 1306.3797 · arxiv_version: 1306.3797v1 · doi: 10.48550/arxiv.1306.3797 · pith_short_12: 45XUDCMPYOFG · pith_short_16: 45XUDCMPYOFGAL3W · pith_short_8: 45XUDCMP

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/45XUDCMPYOFGAL3WL2TYIFXM6I \
  | 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: e76f41898fc38a602f765ea78416ecf215c2f03a5229296409a5bf2c049b97e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29330bf57bd31fa25bce9e8fd87df25872f9ca9bf7548059e8383ae49e91a279",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-06-17T10:12:27Z",
    "title_canon_sha256": "06f4e4e8f8b336e230f7fd5814e8ffa2b0a272554cbd2a54a091f70b2de8bbcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3797",
    "kind": "arxiv",
    "version": 1
  }
}