Pith Number

pith:44KENFSQ

pith:2009:44KENFSQRWCGNBIL4DHFHM6IAG

not attested not anchored not stored refs pending

Buchstaber invariants of skeleta of a simplex

Mikiya Masuda, Yukiko Fukukawa

arxiv:0908.3448 v2 · 2009-08-24 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{44KENFSQRWCGNBIL4DHFHM6IAG}

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	2026-05-18T04:18:33.287159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7144696508d8466850be0ce53b3c801a1b0607248ab6fa565480053c4fe722f

Aliases

arxiv: 0908.3448 · arxiv_version: 0908.3448v2 · doi: 10.48550/arxiv.0908.3448 · pith_short_12: 44KENFSQRWCG · pith_short_16: 44KENFSQRWCGNBIL · pith_short_8: 44KENFSQ

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/44KENFSQRWCGNBIL4DHFHM6IAG \
  | 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: e7144696508d8466850be0ce53b3c801a1b0607248ab6fa565480053c4fe722f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ba460a1aa6dbc7d6a45c8e4493eee0e9a7db46e42c77790eedeb1ebecece81b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2009-08-24T14:29:19Z",
    "title_canon_sha256": "8508c809bec94f2389b69bdf62a96ec90c0fa685474689e7870a3b85f6145d41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3448",
    "kind": "arxiv",
    "version": 2
  }
}