Pith Number

pith:U7SGHGZZ

pith:2013:U7SGHGZZMV7V4YXXLCSDZD5CDW

not attested not anchored not stored refs pending

Construction of two SD Codes

James S. Plank, Mario Blaum

arxiv:1305.1221 v1 · 2013-05-06 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U7SGHGZZMV7V4YXXLCSDZD5CDW}

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	2026-05-18T03:26:23.768604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7e4639b39657f5e62f758a43c8fa21d90fbf975f2c156755d930b3b2bf0cd7f

Aliases

arxiv: 1305.1221 · arxiv_version: 1305.1221v1 · doi: 10.48550/arxiv.1305.1221 · pith_short_12: U7SGHGZZMV7V · pith_short_16: U7SGHGZZMV7V4YXX · pith_short_8: U7SGHGZZ

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/U7SGHGZZMV7V4YXXLCSDZD5CDW \
  | 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: a7e4639b39657f5e62f758a43c8fa21d90fbf975f2c156755d930b3b2bf0cd7f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbfac78e6656119d1051ee6f7b38938b9b2eb8767f40277120a59e147cdfab95",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-05-06T15:30:31Z",
    "title_canon_sha256": "859b48990a3e9ab170313e20117c62fc9fab7bd8431c0ca4a641f1db86d3967e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1221",
    "kind": "arxiv",
    "version": 1
  }
}