Pith Number

pith:PGRWTKV7

pith:2013:PGRWTKV7XIETZECBUIE5YR6FCU

not attested not anchored not stored refs pending

Approximation of Nonnegative Systems by Finite Impulse Response Convolutions

Lorenzo Finesso, Peter Spreij

arxiv:1306.0914 v3 · 2013-06-04 · 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{PGRWTKV7XIETZECBUIE5YR6FCU}

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	2026-05-18T01:37:02.629818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79a369aabfba093c9041a209dc47c5153fbee8dc2c6249a47f0bd98839e84192

Aliases

arxiv: 1306.0914 · arxiv_version: 1306.0914v3 · doi: 10.48550/arxiv.1306.0914 · pith_short_12: PGRWTKV7XIET · pith_short_16: PGRWTKV7XIETZECB · pith_short_8: PGRWTKV7

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/PGRWTKV7XIETZECBUIE5YR6FCU \
  | 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: 79a369aabfba093c9041a209dc47c5153fbee8dc2c6249a47f0bd98839e84192

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62fc99112953c80c34ad008e669d60c7596c854db0569a660bcb6633225d93ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-06-04T20:03:10Z",
    "title_canon_sha256": "d7b1dbef84a919ab8371974fd07333345c749e31d0c483ad38d6fef4aa81eeb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.0914",
    "kind": "arxiv",
    "version": 3
  }
}