Pith Number

pith:CFGEJ3CS

pith:2017:CFGEJ3CSPJS4OUOJE76P3O3TJE

not attested not anchored not stored refs pending

Banach strong Novikov conjecture for polynomially contractible groups

Alexander Engel

arxiv:1702.02269 v3 · 2017-02-08 · math.KT · math.AT · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CFGEJ3CSPJS4OUOJE76P3O3TJE}

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	2026-05-18T00:18:53.932853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

114c44ec527a65c751c927fcfdbb734938179463290c01817379836b2ca8604b

Aliases

arxiv: 1702.02269 · arxiv_version: 1702.02269v3 · doi: 10.48550/arxiv.1702.02269 · pith_short_12: CFGEJ3CSPJS4 · pith_short_16: CFGEJ3CSPJS4OUOJ · pith_short_8: CFGEJ3CS

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/CFGEJ3CSPJS4OUOJE76P3O3TJE \
  | 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: 114c44ec527a65c751c927fcfdbb734938179463290c01817379836b2ca8604b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "27d3ae4e103ca4bcbf55022561edace600b6151e225350833dbe1c6e600d099f",
    "cross_cats_sorted": [
      "math.AT",
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2017-02-08T04:06:12Z",
    "title_canon_sha256": "eebb69afaa1f0e3fa33410334aefc2f9820c7e0f5cc34bd2f8af8faac01da6b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.02269",
    "kind": "arxiv",
    "version": 3
  }
}