Pith Number

pith:FU75CRK5

pith:2017:FU75CRK5DCBJGIPALYJD73VOQE

not attested not anchored not stored refs pending

Approximation in the closed unit ball

Javad Mashreghi, Thomas Ransford

arxiv:1701.05538 v1 · 2017-01-19 · 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{FU75CRK5DCBJGIPALYJD73VOQE}

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	2026-05-18T00:52:29.607962Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d3fd1455d18829321e05e123feeae8117f73d0dbc78a2bf3a9b35000408a31e

Aliases

arxiv: 1701.05538 · arxiv_version: 1701.05538v1 · doi: 10.48550/arxiv.1701.05538 · pith_short_12: FU75CRK5DCBJ · pith_short_16: FU75CRK5DCBJGIPA · pith_short_8: FU75CRK5

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/FU75CRK5DCBJGIPALYJD73VOQE \
  | 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: 2d3fd1455d18829321e05e123feeae8117f73d0dbc78a2bf3a9b35000408a31e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "73ffd07f490b22c68f837e9c14110dfb5d7d9dd53a30dcca1de34ea696c4da2f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2017-01-19T18:23:46Z",
    "title_canon_sha256": "a5b5f1cf1a01e8e2b2f8965570a5e7681da135d90b819f89784b3edd4b375170"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.05538",
    "kind": "arxiv",
    "version": 1
  }
}