Pith Number

pith:EEHDRCOE

pith:2010:EEHDRCOEPFBER6PLEL3RBYJMXD

not attested not anchored not stored refs pending

Matchings, coverings, and Castelnuovo-Mumford regularity

Russ Woodroofe

arxiv:1009.2756 v4 · 2010-09-14 · math.CO · math.AC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EEHDRCOEPFBER6PLEL3RBYJMXD}

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	2026-05-18T02:43:16.826337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

210e3889c4794248f9eb22f710e12cb8d4468d6b4d198f6602737daa6cb11b3c

Aliases

arxiv: 1009.2756 · arxiv_version: 1009.2756v4 · doi: 10.48550/arxiv.1009.2756 · pith_short_12: EEHDRCOEPFBE · pith_short_16: EEHDRCOEPFBER6PL · pith_short_8: EEHDRCOE

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/EEHDRCOEPFBER6PLEL3RBYJMXD \
  | 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: 210e3889c4794248f9eb22f710e12cb8d4468d6b4d198f6602737daa6cb11b3c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67dd9d91c5fee99430783673cabdb5d6ac0f7315982dac647683c8ef50e232ca",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-09-14T20:02:01Z",
    "title_canon_sha256": "316d21f7f6db9e182de4ac0708e271c390b524d7c08a0d645e48bf92b1951723"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.2756",
    "kind": "arxiv",
    "version": 4
  }
}