Pith Number

pith:BAKHX4YB

pith:2008:BAKHX4YBIBA4VHPEBD2PMMP3NF

not attested not anchored not stored refs pending

On Unique Decodability

Marco Dalai, Riccardo Leonardi

arxiv:0809.1043 v1 · 2008-09-05 · 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{BAKHX4YBIBA4VHPEBD2PMMP3NF}

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	2026-05-18T00:58:25.386518Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08147bf3014041ca9de408f4f631fb6972c5796dbbba6076cad863cbfb171bb6

Aliases

arxiv: 0809.1043 · arxiv_version: 0809.1043v1 · doi: 10.48550/arxiv.0809.1043 · pith_short_12: BAKHX4YBIBA4 · pith_short_16: BAKHX4YBIBA4VHPE · pith_short_8: BAKHX4YB

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/BAKHX4YBIBA4VHPEBD2PMMP3NF \
  | 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: 08147bf3014041ca9de408f4f631fb6972c5796dbbba6076cad863cbfb171bb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c0d5df61902fbcc0029844aa11d3dfa46f2534e4501102aade25bfb4cae4a8e",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2008-09-05T15:06:37Z",
    "title_canon_sha256": "a4b6a4cd289c9dbb0be979e1ad098ebb432aa422cff5b79a52044028f41cd964"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1043",
    "kind": "arxiv",
    "version": 1
  }
}