Pith Number

pith:4NGOBLCA

pith:2012:4NGOBLCANWWXT3WWPZQIDO3VCF

not attested not anchored not stored refs pending

Intersecting faces of a simplicial complex via algebraic shifting

S. A. Seyed Fakhari

arxiv:1202.4942 v2 · 2012-02-22 · 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{4NGOBLCANWWXT3WWPZQIDO3VCF}

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	2026-05-18T04:01:39.101942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e34ce0ac406dad79eed67e6081bb7511459c5834860068e2246e6444dd9f97b0

Aliases

arxiv: 1202.4942 · arxiv_version: 1202.4942v2 · doi: 10.48550/arxiv.1202.4942 · pith_short_12: 4NGOBLCANWWX · pith_short_16: 4NGOBLCANWWXT3WW · pith_short_8: 4NGOBLCA

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/4NGOBLCANWWXT3WWPZQIDO3VCF \
  | 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: e34ce0ac406dad79eed67e6081bb7511459c5834860068e2246e6444dd9f97b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1be7485f98e688863ed73c07773fcb6ccc4ea9ac77cd1dfff0a085d683184bc6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-02-22T15:41:50Z",
    "title_canon_sha256": "d7d0b32ddec7f1a486dfe1c064ff45c18cb97b5d20c7d57b9d9e9a5b4ef419a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4942",
    "kind": "arxiv",
    "version": 2
  }
}