Pith Number

pith:7H5RSDCL

pith:2015:7H5RSDCLV4OBC6E4QQSFIF2G3B

not attested not anchored not stored refs pending

Postnikov-Shapiro Algebras, Graphical Matroids and their generalizations

Gleb Nenashev

arxiv:1509.08736 v4 · 2015-09-29 · math.CO · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7H5RSDCLV4OBC6E4QQSFIF2G3B}

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	2026-05-18T00:49:34.876802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9fb190c4baf1c11789c8424541746d856b1efc815ea29b957c503d45f3d5207

Aliases

arxiv: 1509.08736 · arxiv_version: 1509.08736v4 · doi: 10.48550/arxiv.1509.08736 · pith_short_12: 7H5RSDCLV4OB · pith_short_16: 7H5RSDCLV4OBC6E4 · pith_short_8: 7H5RSDCL

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/7H5RSDCLV4OBC6E4QQSFIF2G3B \
  | 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: f9fb190c4baf1c11789c8424541746d856b1efc815ea29b957c503d45f3d5207

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33bd5f0468bdbd4086e1b10eda6ae491ce0fbec76daee298c952ba7509bf3a23",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-09-29T13:22:31Z",
    "title_canon_sha256": "d4a9bbafff565ab9aea2cde5eb11ae194e563dd355bf6aa687370fe764b1d824"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08736",
    "kind": "arxiv",
    "version": 4
  }
}