Pith Number

pith:U2MXOXDA

pith:2017:U2MXOXDALKTSQJSI7WDSWZMGOZ

not attested not anchored not stored refs pending

Wolf Barth (1942--2016)

Alessandra Sarti, Klaus Hulek, Slawomir Rams, Thomas Bauer, Tomasz Szemberg

arxiv:1704.07446 v1 · 2017-04-24 · math.HO · math.AG · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U2MXOXDALKTSQJSI7WDSWZMGOZ}

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	2026-05-18T00:45:38.079526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a699775c605aa7282648fd872b6586766a63484993edcdfd5481b53713ff3442

Aliases

arxiv: 1704.07446 · arxiv_version: 1704.07446v1 · doi: 10.48550/arxiv.1704.07446 · pith_short_12: U2MXOXDALKTS · pith_short_16: U2MXOXDALKTSQJSI · pith_short_8: U2MXOXDA

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/U2MXOXDALKTSQJSI7WDSWZMGOZ \
  | 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: a699775c605aa7282648fd872b6586766a63484993edcdfd5481b53713ff3442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a84ba9b726430907f4ecf631e9acf8b351659d2921bdfdf52da7be132228e91",
    "cross_cats_sorted": [
      "math.AG",
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2017-04-24T20:10:38Z",
    "title_canon_sha256": "b4a44aadb5563c9d3df7855ee371010a2c6f76db2215c2df21f3bd920428de43"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.07446",
    "kind": "arxiv",
    "version": 1
  }
}