Pith Number

pith:HBRPTWAB

pith:2017:HBRPTWABZNVDS6GP2WQBCHVD74

not attested not anchored not stored refs pending

Variable-length codes for channels with memory and feedback: error-exponent upper bounds

Achilleas Anastasopoulos, Jui Wu

arxiv:1701.06678 v4 · 2017-01-23 · 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{HBRPTWABZNVDS6GP2WQBCHVD74}

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	2026-05-18T00:40:40.572121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3862f9d801cb6a3978cfd5a0111ea3ff037a8aeb140bce21caeae5af0c740fee

Aliases

arxiv: 1701.06678 · arxiv_version: 1701.06678v4 · doi: 10.48550/arxiv.1701.06678 · pith_short_12: HBRPTWABZNVD · pith_short_16: HBRPTWABZNVDS6GP · pith_short_8: HBRPTWAB

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/HBRPTWABZNVDS6GP2WQBCHVD74 \
  | 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: 3862f9d801cb6a3978cfd5a0111ea3ff037a8aeb140bce21caeae5af0c740fee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60945cd834251c3e660f4abd10c0c9ca492fdf4dea0b33a78830d6270d96f390",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2017-01-23T23:35:16Z",
    "title_canon_sha256": "68fc8db476efa9c034a2fdc5f1dbd92cf6dd99d0649cc54b390e434423615e4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.06678",
    "kind": "arxiv",
    "version": 4
  }
}