Pith Number

pith:STH27A6C

pith:2015:STH27A6CETJKTL2MAQ3JEF267M

not attested not anchored not stored refs pending

The extremal functions of classes of matroids of bounded branch-width

Rohan Kapadia

arxiv:1503.07954 v2 · 2015-03-27 · 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{STH27A6CETJKTL2MAQ3JEF267M}

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	2026-05-18T01:22:08.097407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94cfaf83c224d2a9af4c043692175efb3fa9dcd3b52442d92f289be6086b0246

Aliases

arxiv: 1503.07954 · arxiv_version: 1503.07954v2 · doi: 10.48550/arxiv.1503.07954 · pith_short_12: STH27A6CETJK · pith_short_16: STH27A6CETJKTL2M · pith_short_8: STH27A6C

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/STH27A6CETJKTL2MAQ3JEF267M \
  | 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: 94cfaf83c224d2a9af4c043692175efb3fa9dcd3b52442d92f289be6086b0246

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0575827f00bccfaff9efff9bf75ce1c3d3c030fa6c32c80acf93feb9368b6ca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-03-27T03:59:43Z",
    "title_canon_sha256": "201a25dc52b064d2e89f2dc63aa091ca497d17d94bf89832fe4d6e1b5ce03f12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.07954",
    "kind": "arxiv",
    "version": 2
  }
}