Pith Number

pith:NLYKVP3K

pith:2014:NLYKVP3KSALVQSLW3F5QBNWQYF

not attested not anchored not stored refs pending

Extending obstructions to noncommutative functorial spectra

Benno van den Berg, Chris Heunen

arxiv:1407.2745 v1 · 2014-07-10 · math.CT · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NLYKVP3KSALVQSLW3F5QBNWQYF}

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	2026-05-18T02:44:56.119864Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6af0aabf6a9017584976d97b00b6d0c160b7cf1aeea2865081cb3bfa5ebb2b91

Aliases

arxiv: 1407.2745 · arxiv_version: 1407.2745v1 · doi: 10.48550/arxiv.1407.2745 · pith_short_12: NLYKVP3KSALV · pith_short_16: NLYKVP3KSALVQSLW · pith_short_8: NLYKVP3K

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/NLYKVP3KSALVQSLW3F5QBNWQYF \
  | 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: 6af0aabf6a9017584976d97b00b6d0c160b7cf1aeea2865081cb3bfa5ebb2b91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d7ff3f0e9624722dd31634acfd17484d7c925da8fae68e71e4ca4b756e75851",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2014-07-10T10:29:19Z",
    "title_canon_sha256": "1f2b0144ef8eaa3ddb4c3e2465cba72de283282aff10d6c83fdb61574df9ed0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.2745",
    "kind": "arxiv",
    "version": 1
  }
}