Pith Number

pith:55K64FRE

pith:2012:55K64FRESADNWQWUQ6VQNCKBH6

not attested not anchored not stored refs pending

Practical Coding Schemes for Cognitive Overlay Radios

Andrea Goldsmith, Ernest Kurniawan, Stefano Rini

arxiv:1203.4844 v2 · 2012-03-21 · 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{55K64FRESADNWQWUQ6VQNCKBH6}

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	2026-05-18T03:53:54.162007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef55ee16249006db42d487ab0689413fb345a2255361c879db7bd9a632f900b8

Aliases

arxiv: 1203.4844 · arxiv_version: 1203.4844v2 · doi: 10.48550/arxiv.1203.4844 · pith_short_12: 55K64FRESADN · pith_short_16: 55K64FRESADNWQWU · pith_short_8: 55K64FRE

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/55K64FRESADNWQWUQ6VQNCKBH6 \
  | 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: ef55ee16249006db42d487ab0689413fb345a2255361c879db7bd9a632f900b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b0cdd7e9b88fc24e04ae401557f51ffad65247a1860cb759ff4360a9af2578a",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-03-21T21:39:24Z",
    "title_canon_sha256": "26f1505dc694c09de6b51f8a40abc1d55be4f1ca555f796cc6f3fbf57c21356f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.4844",
    "kind": "arxiv",
    "version": 2
  }
}