Pith Number

pith:SETISMRR

pith:2014:SETISMRRRYWNJH4XWNY4CYGJQI

not attested not anchored not stored refs pending

Codimension two index obstructions to positive scalar curvature

Bernhard Hanke (Universit\"at Augsburg), Daniel Pape (Georg-August-Universit\"at G\"ottingen), Thomas Schick (Georg-August-Universit\"at G\"ottingen)

arxiv:1402.4094 v2 · 2014-02-17 · math.KT · 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{SETISMRRRYWNJH4XWNY4CYGJQI}

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	2026-05-18T00:05:08.216011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91268932318e2cd49f97b371c160c9821482abf056ae6a41580dde68cafe0f95

Aliases

arxiv: 1402.4094 · arxiv_version: 1402.4094v2 · doi: 10.48550/arxiv.1402.4094 · pith_short_12: SETISMRRRYWN · pith_short_16: SETISMRRRYWNJH4X · pith_short_8: SETISMRR

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/SETISMRRRYWNJH4XWNY4CYGJQI \
  | 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: 91268932318e2cd49f97b371c160c9821482abf056ae6a41580dde68cafe0f95

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7dbb43c19d6d3e482c87e10e8c3b9077dea573d668ed5a56897d38f5b1cfa730",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2014-02-17T18:53:07Z",
    "title_canon_sha256": "c313eb431fcf9d81b4f7a874311d0c546dee6401ee0749395103ee4d957ce8ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.4094",
    "kind": "arxiv",
    "version": 2
  }
}