Pith Number

pith:3QCR2EJG

pith:2014:3QCR2EJGC6A2NZKXJCFKUO3SOG

not attested not anchored not stored refs pending

Six Constructions of Difference Families

Chik How Tan, Cunsheng Ding, Yin Tan

arxiv:1411.3643 v1 · 2014-11-13 · cs.IT · math.CO · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3QCR2EJGC6A2NZKXJCFKUO3SOG}

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	2026-05-18T02:37:43.263405Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc051d11261781a6e557488aaa3b7271a4fd78332c2575b2d598812c41758def

Aliases

arxiv: 1411.3643 · arxiv_version: 1411.3643v1 · doi: 10.48550/arxiv.1411.3643 · pith_short_12: 3QCR2EJGC6A2 · pith_short_16: 3QCR2EJGC6A2NZKX · pith_short_8: 3QCR2EJG

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/3QCR2EJGC6A2NZKXJCFKUO3SOG \
  | 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: dc051d11261781a6e557488aaa3b7271a4fd78332c2575b2d598812c41758def

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e324a207f80e38c33e41aea6d545e05b1b1d47edd0896fba2fbf52a81706e59",
    "cross_cats_sorted": [
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2014-11-13T18:07:50Z",
    "title_canon_sha256": "83b720a9b91bf33d8f107cf7e620fecc0e74560c16aae74e913db8be4965c6de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.3643",
    "kind": "arxiv",
    "version": 1
  }
}