Pith Number

pith:FKC4I5QQ

pith:2015:FKC4I5QQ5YOTAC7OHQ6477HZAD

not attested not anchored not stored refs pending

Low-Coherence Frames from Group Fourier Matrices

Babak Hassibi, Matthew Thill

arxiv:1509.05739 v1 · 2015-09-18 · 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{FKC4I5QQ5YOTAC7OHQ6477HZAD}

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	2026-05-18T01:32:42.468098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a85c47610ee1d300bee3c3dcffcf900eb7fe45acd82885e528ccfb7f1953ebe

Aliases

arxiv: 1509.05739 · arxiv_version: 1509.05739v1 · doi: 10.48550/arxiv.1509.05739 · pith_short_12: FKC4I5QQ5YOT · pith_short_16: FKC4I5QQ5YOTAC7O · pith_short_8: FKC4I5QQ

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/FKC4I5QQ5YOTAC7OHQ6477HZAD \
  | 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: 2a85c47610ee1d300bee3c3dcffcf900eb7fe45acd82885e528ccfb7f1953ebe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adee9f9b26c08f1ab78ddaf5f08989d144650add7c3d975b8cdb8d09f4b2ddb3",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-09-18T18:25:39Z",
    "title_canon_sha256": "d22b6eb114e03691224aa78fcc2cd975eff1495af95f9891308a4d3d406ce773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05739",
    "kind": "arxiv",
    "version": 1
  }
}