Pith Number

pith:GWP5PZ6Q

pith:2018:GWP5PZ6Q5FCLQSZK2JSVPI4KGQ

not attested not anchored not stored refs pending

On the classification of almost contact metric manifolds

Francisco Mart\'in Cabrera

arxiv:1802.08017 v2 · 2018-02-22 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GWP5PZ6Q5FCLQSZK2JSVPI4KGQ}

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	2026-05-17T23:54:34.573571Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

359fd7e7d0e944b84b2ad26557a38a3420dabad1a6a35e1cc6c7fa18b50a544d

Aliases

arxiv: 1802.08017 · arxiv_version: 1802.08017v2 · doi: 10.48550/arxiv.1802.08017 · pith_short_12: GWP5PZ6Q5FCL · pith_short_16: GWP5PZ6Q5FCLQSZK · pith_short_8: GWP5PZ6Q

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/GWP5PZ6Q5FCLQSZK2JSVPI4KGQ \
  | 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: 359fd7e7d0e944b84b2ad26557a38a3420dabad1a6a35e1cc6c7fa18b50a544d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1423bc9224b41d103ce2c5d93d5a22bb17bcb630d8fbf17b87f2e174db90a62d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-02-22T12:52:31Z",
    "title_canon_sha256": "b3b418eaeecaec026dad63a1d93191fb35e7fefa95f07a4bce979a52e586ad6a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.08017",
    "kind": "arxiv",
    "version": 2
  }
}