Pith Number

pith:LWDWCQVJ

pith:2018:LWDWCQVJ4X6IHCV6DOJV4CVQ5A

not attested not anchored not stored refs pending

On a Problem of Janusz Matkowski and Jacek Weso{\l}owski, II

Janusz Morawiec, Thomas Z\"urcher

arxiv:1801.07944 v1 · 2018-01-24 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LWDWCQVJ4X6IHCV6DOJV4CVQ5A}

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	2026-05-18T00:24:35.743138Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d876142a9e5fc838abe1b935e0ab0e81baf04c6505d138e1e729d2ddeaece46

Aliases

arxiv: 1801.07944 · arxiv_version: 1801.07944v1 · doi: 10.48550/arxiv.1801.07944 · pith_short_12: LWDWCQVJ4X6I · pith_short_16: LWDWCQVJ4X6IHCV6 · pith_short_8: LWDWCQVJ

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/LWDWCQVJ4X6IHCV6DOJV4CVQ5A \
  | 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: 5d876142a9e5fc838abe1b935e0ab0e81baf04c6505d138e1e729d2ddeaece46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "566ac3e086f04b96e9908c0181dc4c67ede6f7120900278f74d17cd6f182aad5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2018-01-24T12:05:03Z",
    "title_canon_sha256": "f56cdf845110697e7b3c14c05c37f303815f50feb78955aca1d88c19e66db21c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.07944",
    "kind": "arxiv",
    "version": 1
  }
}