Pith Number

pith:L6LRY67F

pith:2014:L6LRY67FNXPKPSTXOYKRBCYRPZ

not attested not anchored not stored refs pending

H-principle for 4-dimensional contact foliations

Alvaro del Pino, Francisco Presas, Roger Casals

arxiv:1406.7238 v1 · 2014-06-27 · 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{L6LRY67FNXPKPSTXOYKRBCYRPZ}

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	2026-05-18T00:39:07.377776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f971c7be56ddea7ca777615108b117e42d9709574d5e17de81d46717d2362c3

Aliases

arxiv: 1406.7238 · arxiv_version: 1406.7238v1 · doi: 10.48550/arxiv.1406.7238 · pith_short_12: L6LRY67FNXPK · pith_short_16: L6LRY67FNXPKPSTX · pith_short_8: L6LRY67F

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/L6LRY67FNXPKPSTXOYKRBCYRPZ \
  | 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: 5f971c7be56ddea7ca777615108b117e42d9709574d5e17de81d46717d2362c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d5257b56ed7ba15da82ec1d4e728c78e7995b94a7b146fd5dd59353c39d1280",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2014-06-27T17:11:52Z",
    "title_canon_sha256": "acc0f1344b8b31e33ef0f56a395e69ca2e649953ccd32a61bba8002ff73311de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.7238",
    "kind": "arxiv",
    "version": 1
  }
}