Pith Number

pith:U7FHZWOU

pith:2019:U7FHZWOUHWPQUIXQHRVIX2UHCM

not attested not anchored not stored refs pending

Normal Crossings Singularities for Symplectic Topology, II

Aleksey Zinger, Mark McLean, Mohammad Farajzadeh Tehrani

arxiv:1908.09390 v1 · 2019-08-25 · math.SG · hep-th · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U7FHZWOUHWPQUIXQHRVIX2UHCM}

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	2026-07-04T23:59:39.651756Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7ca7cd9d43d9f0a22f03c6a8bea8713314f4914301f72ca385e13cddcc14c65

Aliases

arxiv: 1908.09390 · arxiv_version: 1908.09390v1 · doi: 10.48550/arxiv.1908.09390 · pith_short_12: U7FHZWOUHWPQ · pith_short_16: U7FHZWOUHWPQUIXQ · pith_short_8: U7FHZWOU

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/U7FHZWOUHWPQUIXQHRVIX2UHCM \
  | 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: a7ca7cd9d43d9f0a22f03c6a8bea8713314f4914301f72ca385e13cddcc14c65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4346a83a1a92d178a794455ae01701bfa663450165b77777865d0f501cf2e62e",
    "cross_cats_sorted": [
      "hep-th",
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2019-08-25T21:10:16Z",
    "title_canon_sha256": "828a07f2cd88b2163025f85a7523782a86b227e52fe256d5674f0f4beb425d3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09390",
    "kind": "arxiv",
    "version": 1
  }
}