Pith Number

pith:NQBFVGCF

pith:2012:NQBFVGCFBWD2UHCAFQ6XFWXEQP

not attested not anchored not stored refs pending

On the Relationships among Optimal Symmetric Fix-Free Codes

Serap A. Savari, S. M. Hossein Tabatabaei Yazdi

arxiv:1211.2723 v1 · 2012-11-12 · 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{NQBFVGCFBWD2UHCAFQ6XFWXEQP}

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	2026-05-18T03:41:02.036814Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c025a98450d87aa1c402c3d72dae483e354bb32a79643b8d8958be635abcab1

Aliases

arxiv: 1211.2723 · arxiv_version: 1211.2723v1 · doi: 10.48550/arxiv.1211.2723 · pith_short_12: NQBFVGCFBWD2 · pith_short_16: NQBFVGCFBWD2UHCA · pith_short_8: NQBFVGCF

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/NQBFVGCFBWD2UHCAFQ6XFWXEQP \
  | 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: 6c025a98450d87aa1c402c3d72dae483e354bb32a79643b8d8958be635abcab1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d54805115f8019e397dd15e39d7aad291902d59eea0ab0a89c5fa5d21910f07",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-11-12T18:26:32Z",
    "title_canon_sha256": "8ebb7c3a408e5bda9aa7ce97c3b8c9973f92a8bc7ef272d70069065ee50a553c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2723",
    "kind": "arxiv",
    "version": 1
  }
}