Pith Number

pith:ZY4QGKKN

pith:2017:ZY4QGKKNVQ4MSMJRWEXKJ4FJ4U

not attested not anchored not stored refs pending

A simple discharging method for forbidden subposet problems

Abhishek Methuku, Andrew Uzzell, Ryan R. Martin, Shanise Walker

arxiv:1710.05057 v2 · 2017-10-13 · 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{ZY4QGKKNVQ4MSMJRWEXKJ4FJ4U}

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	2026-05-18T00:27:52.096818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce3903294dac38c93131b12ea4f0a9e511243b0261086b97bac29681b67c62db

Aliases

arxiv: 1710.05057 · arxiv_version: 1710.05057v2 · doi: 10.48550/arxiv.1710.05057 · pith_short_12: ZY4QGKKNVQ4M · pith_short_16: ZY4QGKKNVQ4MSMJR · pith_short_8: ZY4QGKKN

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/ZY4QGKKNVQ4MSMJRWEXKJ4FJ4U \
  | 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: ce3903294dac38c93131b12ea4f0a9e511243b0261086b97bac29681b67c62db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e323e7250d3300410caff441709413e6c67ba8f44842cfe591a6e738544c6435",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-10-13T19:27:02Z",
    "title_canon_sha256": "282d6b1db0b4badfc1a686ab1a9375e517174bcca11b65c4b0a6edc7595dd635"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.05057",
    "kind": "arxiv",
    "version": 2
  }
}