Pith Number

pith:6W4RJ3B6

pith:2015:6W4RJ3B6ER2FNDWIY6AKN2AEHI

not attested not anchored not stored refs pending

On a problem of Mazur from "The Scottish Book" concerning second partial derivatives

A. Plichko, V. Mykhaylyuk

arxiv:1508.06909 v2 · 2015-08-26 · math.CA · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6W4RJ3B6ER2FNDWIY6AKN2AEHI}

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	2026-05-18T01:22:53.947698Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5b914ec3e2474568ec8c780a6e8043a1a619519f120b535cd9a6b8146db8a12

Aliases

arxiv: 1508.06909 · arxiv_version: 1508.06909v2 · doi: 10.48550/arxiv.1508.06909 · pith_short_12: 6W4RJ3B6ER2F · pith_short_16: 6W4RJ3B6ER2FNDWI · pith_short_8: 6W4RJ3B6

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/6W4RJ3B6ER2FNDWIY6AKN2AEHI \
  | 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: f5b914ec3e2474568ec8c780a6e8043a1a619519f120b535cd9a6b8146db8a12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6eb56d84dffa3876622dc70c21892ceb6716c8352e8a7fed1617f6c38bb802d8",
    "cross_cats_sorted": [
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2015-08-26T06:35:56Z",
    "title_canon_sha256": "72a315c0b49aabf7b497c2a387f0bcd2f9d417aa5c0cce9d4e6759b9bc1e9589"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.06909",
    "kind": "arxiv",
    "version": 2
  }
}