Pith Number

pith:VPKYQ4SG

pith:2019:VPKYQ4SG5VROFYWHCHPWOD5OHU

not attested not anchored not stored refs pending

Differential graded algebra over quotients of skew polynomial rings by normal elements

Luigi Ferraro, W. Frank Moore

arxiv:1902.06607 v1 · 2019-02-18 · math.RA · math.AC · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VPKYQ4SG5VROFYWHCHPWOD5OHU}

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	2026-05-17T23:53:44.995005Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abd5887246ed62e2e2c711df670fae3d04a291977ac2ade5a644a9a59063abca

Aliases

arxiv: 1902.06607 · arxiv_version: 1902.06607v1 · doi: 10.48550/arxiv.1902.06607 · pith_short_12: VPKYQ4SG5VRO · pith_short_16: VPKYQ4SG5VROFYWH · pith_short_8: VPKYQ4SG

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/VPKYQ4SG5VROFYWHCHPWOD5OHU \
  | 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: abd5887246ed62e2e2c711df670fae3d04a291977ac2ade5a644a9a59063abca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc11c2d8912bbf4aef58004905973374e74ff63b9db4dc374a081618ac1aeb20",
    "cross_cats_sorted": [
      "math.AC",
      "math.QA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-02-18T15:19:17Z",
    "title_canon_sha256": "cef4e2ed26cb2d9e9e38b21877bc76a968a67233da94bc6512312cbc8bf6af71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06607",
    "kind": "arxiv",
    "version": 1
  }
}