Pith Number

pith:UAPOT6CN

pith:2017:UAPOT6CNAHK2TLQTFC5TLR3TIR

not attested not anchored not stored refs pending

On the cohomology of the mapping class group of the punctured projective plane

Miguel A. Maldonado, Miguel A. Xicot\'encatl

arxiv:1705.07937 v1 · 2017-05-22 · math.AT · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UAPOT6CNAHK2TLQTFC5TLR3TIR}

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	2026-05-18T00:44:04.092877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a01ee9f84d01d5a9ae1328bb35c773445bd77e5138cdf9eb675d5869e76b82c6

Aliases

arxiv: 1705.07937 · arxiv_version: 1705.07937v1 · doi: 10.48550/arxiv.1705.07937 · pith_short_12: UAPOT6CNAHK2 · pith_short_16: UAPOT6CNAHK2TLQT · pith_short_8: UAPOT6CN

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/UAPOT6CNAHK2TLQTFC5TLR3TIR \
  | 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: a01ee9f84d01d5a9ae1328bb35c773445bd77e5138cdf9eb675d5869e76b82c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5334e2c4b6d16df0e62abb81efcdbeba61c2e566e81097bf1a3a431cab9c7290",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-05-22T18:26:30Z",
    "title_canon_sha256": "2268f26a016b56df225d168f4d02fc2f373232c0ae3bf49be6296a6019e10ea4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07937",
    "kind": "arxiv",
    "version": 1
  }
}