Pith Number

pith:UFRGTC3S

pith:2018:UFRGTC3SPXNTGJH3EOQZ62ZIKA

not attested not anchored not stored refs pending

Injectives Hulls and Projective Covers in Categories of Generalized Uniform Hypergraphs

Martin Schmidt

arxiv:1807.09348 v1 · 2018-07-24 · math.CO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UFRGTC3SPXNTGJH3EOQZ62ZIKA}

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	2026-05-18T00:09:51.600541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a162698b727ddb3324fb23a19f6b28502605d0de2a9022c20d40c0132908f422

Aliases

arxiv: 1807.09348 · arxiv_version: 1807.09348v1 · doi: 10.48550/arxiv.1807.09348 · pith_short_12: UFRGTC3SPXNT · pith_short_16: UFRGTC3SPXNTGJH3 · pith_short_8: UFRGTC3S

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/UFRGTC3SPXNTGJH3EOQZ62ZIKA \
  | 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: a162698b727ddb3324fb23a19f6b28502605d0de2a9022c20d40c0132908f422

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9357567edebad91ae63532cf743217fa53db88da3bd7257e0c8e1069e762244d",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-07-24T21:01:41Z",
    "title_canon_sha256": "cd66a0d6227569bb6a41bbb33b5d4e0ebea87ca2179d76f01feec8ee8bf8975c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.09348",
    "kind": "arxiv",
    "version": 1
  }
}