Pith Number

pith:4L2GJGHX

pith:2016:4L2GJGHXKDP7GUWB7CAL6XLCA3

not attested not anchored not stored refs pending

A Single-Letter Upper Bound on the Feedback Capacity of Unifilar Finite-State Channels

Haim H. Permuter, Henry D. Pfister, Oron Sabag

arxiv:1604.01878 v1 · 2016-04-07 · 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{4L2GJGHXKDP7GUWB7CAL6XLCA3}

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	2026-05-18T01:17:31.824934Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2f46498f750dff352c1f880bf5d6206e395078cf40015a9e66fb96ed0dc2a3a

Aliases

arxiv: 1604.01878 · arxiv_version: 1604.01878v1 · doi: 10.48550/arxiv.1604.01878 · pith_short_12: 4L2GJGHXKDP7 · pith_short_16: 4L2GJGHXKDP7GUWB · pith_short_8: 4L2GJGHX

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/4L2GJGHXKDP7GUWB7CAL6XLCA3 \
  | 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: e2f46498f750dff352c1f880bf5d6206e395078cf40015a9e66fb96ed0dc2a3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52d8a35e8b557545056ae128d85578ac87f38fb0e5cf8defc44ec0b93e234fa0",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2016-04-07T05:44:31Z",
    "title_canon_sha256": "fa2db783bb31ca0efcc23a564de74718b00a7e2d43cdf601996cbb95daa56320"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.01878",
    "kind": "arxiv",
    "version": 1
  }
}