Pith Number

pith:CH6ZRIIC

pith:2013:CH6ZRIIC27A5T3H2E3PK3XFND2

not attested not anchored not stored refs pending

On a conjecture of Dekking : The sum of digits of even numbers

Daniel El-Baz, Iurie Boreico, Thomas Stoll

arxiv:1305.1017 v2 · 2013-05-05 · math.NT · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CH6ZRIIC27A5T3H2E3PK3XFND2}

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	2026-05-18T03:26:11.849909Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11fd98a102d7c1d9ecfa26deaddcad1e8eb6a3a4b651939778c0e469323658b3

Aliases

arxiv: 1305.1017 · arxiv_version: 1305.1017v2 · doi: 10.48550/arxiv.1305.1017 · pith_short_12: CH6ZRIIC27A5 · pith_short_16: CH6ZRIIC27A5T3H2 · pith_short_8: CH6ZRIIC

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/CH6ZRIIC27A5T3H2E3PK3XFND2 \
  | 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: 11fd98a102d7c1d9ecfa26deaddcad1e8eb6a3a4b651939778c0e469323658b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "045a0f15eee200b4cacc434d684f297fc24c286349a6ce876f618c8c0b0575fd",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2013-05-05T14:49:35Z",
    "title_canon_sha256": "c88e1748b6e34a937ec9dfac208a9a39dbfa7f8d644e3d36d6308b0f144a968b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1017",
    "kind": "arxiv",
    "version": 2
  }
}