Pith Number

pith:QHXIY5M2

pith:2016:QHXIY5M2NL5DD5NXYOCJSBZX5C

not attested not anchored not stored refs pending

Cohomology of Effect Algebras

Frank Roumen (University of Cambridge)

arxiv:1602.00567 v2 · 2016-02-01 · math.QA · math-ph · math.AT · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QHXIY5M2NL5DD5NXYOCJSBZX5C}

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.

Cited by

1 paper in Pith

Simplicial effects and weakly associative partial groups

Receipt and verification

First computed	2026-05-18T00:53:34.692909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81ee8c759a6afa31f5b7c384990737e8bd7bb0fab54419299e4eb8e693d88c50

Aliases

arxiv: 1602.00567 · arxiv_version: 1602.00567v2 · doi: 10.48550/arxiv.1602.00567 · pith_short_12: QHXIY5M2NL5D · pith_short_16: QHXIY5M2NL5DD5NX · pith_short_8: QHXIY5M2

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/QHXIY5M2NL5DD5NXYOCJSBZX5C \
  | 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: 81ee8c759a6afa31f5b7c384990737e8bd7bb0fab54419299e4eb8e693d88c50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b919e93faf56ff9b902b2bebaa104d67cdfbb2c7aa5708baaad2f1967d27daf",
    "cross_cats_sorted": [
      "math-ph",
      "math.AT",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.QA",
    "submitted_at": "2016-02-01T15:49:33Z",
    "title_canon_sha256": "2c5442ae12e950a74a26273a35380ded20e43b91d721dfe5632f5e65db829379"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.00567",
    "kind": "arxiv",
    "version": 2
  }
}