Pith Number

pith:4BBJO3ZI

pith:2015:4BBJO3ZIAOWF7ZTVWYSCF32ZPK

not attested not anchored not stored refs pending

Discrete Signal Reconstruction by Sum of Absolute Values

Masaaki Nagahara

arxiv:1503.05299 v1 · 2015-03-18 · cs.IT · math.IT · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BBJO3ZIAOWF7ZTVWYSCF32ZPK}

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	2026-05-18T02:21:50.817923Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e042976f2803ac5fe675b62422ef597a9100f1f80c26b65ecaf8c3d09dfd3283

Aliases

arxiv: 1503.05299 · arxiv_version: 1503.05299v1 · doi: 10.48550/arxiv.1503.05299 · pith_short_12: 4BBJO3ZIAOWF · pith_short_16: 4BBJO3ZIAOWF7ZTV · pith_short_8: 4BBJO3ZI

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/4BBJO3ZIAOWF7ZTVWYSCF32ZPK \
  | 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: e042976f2803ac5fe675b62422ef597a9100f1f80c26b65ecaf8c3d09dfd3283

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5929084aac4b55a4eccfda722542bff46f76fffd9822be14e6dd2c50f0833ac1",
    "cross_cats_sorted": [
      "math.IT",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-03-18T08:11:33Z",
    "title_canon_sha256": "2f6708c5d4ffd77413ada38ac34064fa914409d855cac5d163cd6c8aab55b55b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.05299",
    "kind": "arxiv",
    "version": 1
  }
}