Pith Number

pith:NSRNDESX

pith:2019:NSRNDESXS5NFY2FZTA6E7V4HNE

not attested not anchored not stored refs pending

Getting a handle on contact manifolds

Kevin Sackel

arxiv:1905.11965 v1 · 2019-05-28 · 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{NSRNDESXS5NFY2FZTA6E7V4HNE}

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	2026-05-17T23:44:49.810872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ca2d19257975a5c68b9983c4fd787690bea24eb45d4aef5d70a90bc4746a888

Aliases

arxiv: 1905.11965 · arxiv_version: 1905.11965v1 · doi: 10.48550/arxiv.1905.11965 · pith_short_12: NSRNDESXS5NF · pith_short_16: NSRNDESXS5NFY2FZ · pith_short_8: NSRNDESX

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/NSRNDESXS5NFY2FZTA6E7V4HNE \
  | 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: 6ca2d19257975a5c68b9983c4fd787690bea24eb45d4aef5d70a90bc4746a888

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b204539b79936353a058493d80900e91c6f186f8b87343960a8872fd97970e80",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2019-05-28T17:38:46Z",
    "title_canon_sha256": "7e58cc2f707a31c1e24add7df61a514d3eeeb4c1979bec5527c532d2834c29a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.11965",
    "kind": "arxiv",
    "version": 1
  }
}