Pith Number

pith:DNXUDCEM

pith:2017:DNXUDCEMBYKAIBRCIMFVQDRQIZ

not attested not anchored not stored refs pending

The fundamental group of a rigid Lagrangian cobordism

Jean-Fran\c{c}ois Barraud, Lara Simone Su\'arez

arxiv:1702.02345 v1 · 2017-02-08 · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DNXUDCEMBYKAIBRCIMFVQDRQIZ}

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	2026-05-18T00:51:06.169897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b6f41888c0e14040622430b580e30467e0b1ee68650679092ec4cb65ceb9fe3

Aliases

arxiv: 1702.02345 · arxiv_version: 1702.02345v1 · doi: 10.48550/arxiv.1702.02345 · pith_short_12: DNXUDCEMBYKA · pith_short_16: DNXUDCEMBYKAIBRC · pith_short_8: DNXUDCEM

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/DNXUDCEMBYKAIBRCIMFVQDRQIZ \
  | 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: 1b6f41888c0e14040622430b580e30467e0b1ee68650679092ec4cb65ceb9fe3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05db4226d640751f7c52eadf244488570c2b41c1c6772a5268cc97c348876354",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2017-02-08T09:49:31Z",
    "title_canon_sha256": "1832434f61bfe8d910a556c35c40110475e621e94826956f88df353a6c8ed188"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.02345",
    "kind": "arxiv",
    "version": 1
  }
}