Pith Number

pith:ERB3ZYAI

pith:2015:ERB3ZYAI7ELCZIHEZERRYLCID6

not attested not anchored not stored refs pending

Contact twistor spaces and almost contact metric structures

Christian L. Yankov, Johann Davidov

arxiv:1508.00241 v2 · 2015-08-02 · 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{ERB3ZYAI7ELCZIHEZERRYLCID6}

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	2026-05-18T01:13:24.149216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2443bce008f9162ca0e4c9231c2c481f897fa5ae62b1e46c14aa2503d5151ce3

Aliases

arxiv: 1508.00241 · arxiv_version: 1508.00241v2 · doi: 10.48550/arxiv.1508.00241 · pith_short_12: ERB3ZYAI7ELC · pith_short_16: ERB3ZYAI7ELCZIHE · pith_short_8: ERB3ZYAI

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/ERB3ZYAI7ELCZIHEZERRYLCID6 \
  | 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: 2443bce008f9162ca0e4c9231c2c481f897fa5ae62b1e46c14aa2503d5151ce3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08471dd1ebd34e164b4b4f188e9d3b671ba6d789511dbdf92756f3d6f04338c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-08-02T14:10:32Z",
    "title_canon_sha256": "7e51282c9ba835aa5b4428d6e99b399fe888ceab30db21053baebb57b9a7c04d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.00241",
    "kind": "arxiv",
    "version": 2
  }
}