Pith Number

pith:D5FQHCWG

pith:2017:D5FQHCWGQDLPKZSVLKO32K3UNP

not attested not anchored not stored refs pending

On finiteness properties of the Johnson filtrations

Mikhail Ershov, Sue He

arxiv:1703.04190 v5 · 2017-03-12 · math.GR · 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{D5FQHCWGQDLPKZSVLKO32K3UNP}

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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

Calculating the second rational cohomology group of the Torelli group

Receipt and verification

First computed	2026-05-18T00:10:32.391351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f4b038ac680d6f566555a9dbd2b746bece3a29ccd7fdbf014eca89ab108573a

Aliases

arxiv: 1703.04190 · arxiv_version: 1703.04190v5 · doi: 10.48550/arxiv.1703.04190 · pith_short_12: D5FQHCWGQDLP · pith_short_16: D5FQHCWGQDLPKZSV · pith_short_8: D5FQHCWG

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/D5FQHCWGQDLPKZSVLKO32K3UNP \
  | 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: 1f4b038ac680d6f566555a9dbd2b746bece3a29ccd7fdbf014eca89ab108573a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "102ac7934c3ff5f19167861a5cac71d39ad4cea69ad64e35bbd5854ef01c4ca8",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2017-03-12T22:36:50Z",
    "title_canon_sha256": "702dbd7b57efbdb8ce524d1e30b887dc6d0f86388b2e3268ebf46371243c6923"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.04190",
    "kind": "arxiv",
    "version": 5
  }
}