Pith Number

pith:FRWDMWBQ

pith:2021:FRWDMWBQDFI76FTNNTXAHEYBR5

not attested not anchored not stored refs pending

Higher-degree bounded cohomology of transformation groups

Martin Nitsche

arxiv:2105.08698 v1 · 2021-05-18 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FRWDMWBQDFI76FTNNTXAHEYBR5}

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.

Cited by

1 paper in Pith

Bounded cohomology of measure-preserving homeomorphism groups of non-orientable surfaces

Receipt and verification

First computed	2026-07-05T02:41:25.579603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c6c3658301951ff166d6cee0393018f65bae3e8eee4ecb4777b53e8b70192ba

Aliases

arxiv: 2105.08698 · arxiv_version: 2105.08698v1 · doi: 10.48550/arxiv.2105.08698 · pith_short_12: FRWDMWBQDFI7 · pith_short_16: FRWDMWBQDFI76FTN · pith_short_8: FRWDMWBQ

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/FRWDMWBQDFI76FTNNTXAHEYBR5 \
  | 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: 2c6c3658301951ff166d6cee0393018f65bae3e8eee4ecb4777b53e8b70192ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6d240fa11964390e5259a9dfa2bd884c5f49545063d5d9fd96bd49a96b9eb85",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2021-05-18T17:33:56Z",
    "title_canon_sha256": "48b6fc11b19ea82ec3790f00792d42aca2e3486c6f4b829a3536f4d3ba5acb17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.08698",
    "kind": "arxiv",
    "version": 1
  }
}