Pith Number

pith:O5DAD6MI

pith:2014:O5DAD6MI64RC2U5RHVHKSPHJI6

not attested not anchored not stored refs pending

Implicit QR for Companion-like Pencils

Luca Gemignani, Paola Boito, Yuli Eidelman

arxiv:1401.5606 v2 · 2014-01-22 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O5DAD6MI64RC2U5RHVHKSPHJI6}

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	2026-05-18T02:40:54.070829Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

774601f988f7222d53b13d4ea93ce94791f76d58e9e9af4802a08fb4d0d9a8ac

Aliases

arxiv: 1401.5606 · arxiv_version: 1401.5606v2 · doi: 10.48550/arxiv.1401.5606 · pith_short_12: O5DAD6MI64RC · pith_short_16: O5DAD6MI64RC2U5R · pith_short_8: O5DAD6MI

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/O5DAD6MI64RC2U5RHVHKSPHJI6 \
  | 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: 774601f988f7222d53b13d4ea93ce94791f76d58e9e9af4802a08fb4d0d9a8ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35ac5dae3286a461911947011258224f52ea241fe7e81a0b0d2c148fbe202206",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-01-22T10:05:55Z",
    "title_canon_sha256": "bba0fa253c0c4a3c385506532f2a39516c9152d097d9cd73b0f5918edc9f4872"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.5606",
    "kind": "arxiv",
    "version": 2
  }
}