Pith Number

pith:E4MVTQBS

pith:2006:E4MVTQBSXBA7F4KDL37BGGREFT

not attested not anchored not stored refs pending

Q-groupoids and their cohomology

Rajan Amit Mehta

arxiv:math/0611924 v2 · 2006-11-29 · math.DG · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E4MVTQBSXBA7F4KDL37BGGREFT}

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	2026-05-18T04:10:47.312596Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

271959c032b841f2f1435efe131a242cded3aedc86a7c0ebc4820fae2a6ea50c

Aliases

arxiv: math/0611924 · arxiv_version: math/0611924v2 · doi: 10.48550/arxiv.math/0611924 · pith_short_12: E4MVTQBSXBA7 · pith_short_16: E4MVTQBSXBA7F4KD · pith_short_8: E4MVTQBS

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/E4MVTQBSXBA7F4KDL37BGGREFT \
  | 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: 271959c032b841f2f1435efe131a242cded3aedc86a7c0ebc4820fae2a6ea50c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8086aa3fcfd7a732a236c76df974f3d14cd459aae3320d7b3f11ea223fd4de7",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2006-11-29T17:44:50Z",
    "title_canon_sha256": "3565411c126615938d30a3b41d0c928abea375a30546c7a26cb163c34b7d41d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0611924",
    "kind": "arxiv",
    "version": 2
  }
}