Pith Number

pith:6P7TOPKS

pith:2017:6P7TOPKSH2H5LQADECNP66QY2N

not attested not anchored not stored refs pending

Hierarchically cocompact classifying spaces for mapping class groups of surfaces

Brita Nucinkis, Nansen Petrosyan

arxiv:1712.00496 v1 · 2017-12-01 · math.GR · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6P7TOPKSH2H5LQADECNP66QY2N}

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	2026-05-18T00:15:19.662184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3ff373d523e8fd5c003209aff7a18d357453bb6765147c502f221fe809aa4ad

Aliases

arxiv: 1712.00496 · arxiv_version: 1712.00496v1 · doi: 10.48550/arxiv.1712.00496 · pith_short_12: 6P7TOPKSH2H5 · pith_short_16: 6P7TOPKSH2H5LQAD · pith_short_8: 6P7TOPKS

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/6P7TOPKSH2H5LQADECNP66QY2N \
  | 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: f3ff373d523e8fd5c003209aff7a18d357453bb6765147c502f221fe809aa4ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "742052b7d94306a9c5219c3e9129b2e84cbd93375d3a2dd5fc88a571912340cb",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-12-01T21:17:57Z",
    "title_canon_sha256": "7b470bc0fd17057a68251ca6845099efea75a8591417881ac204c816716b81f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.00496",
    "kind": "arxiv",
    "version": 1
  }
}