Pith Number

pith:JCNAM4CA

pith:2017:JCNAM4CAPQNOA7PS2OHBTUAQQS

not attested not anchored not stored refs pending

On transitive contact and $CR$ algebras

Andrea Spiro, Costantino Medori, Mauro Nacinovich, Stefano Marini

arxiv:1706.03512 v1 · 2017-06-12 · 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{JCNAM4CAPQNOA7PS2OHBTUAQQS}

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	2026-05-18T00:42:34.474371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

489a0670407c1ae07df2d38e19d0108497a96b4387afbd7c7dbb42aded642604

Aliases

arxiv: 1706.03512 · arxiv_version: 1706.03512v1 · doi: 10.48550/arxiv.1706.03512 · pith_short_12: JCNAM4CAPQNO · pith_short_16: JCNAM4CAPQNOA7PS · pith_short_8: JCNAM4CA

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/JCNAM4CAPQNOA7PS2OHBTUAQQS \
  | 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: 489a0670407c1ae07df2d38e19d0108497a96b4387afbd7c7dbb42aded642604

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91d762564e71170d8b1cc9e95936db8ff0f28eae1a350d67611f2f7d54962674",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-06-12T08:38:43Z",
    "title_canon_sha256": "51edb90d60e6e2a6c1eed7a44e8dbdb23827e58b6ca93414574b35f405a3a37b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.03512",
    "kind": "arxiv",
    "version": 1
  }
}