Pith Number

pith:7VE75PWR

pith:2011:7VE75PWR4DSI2IY2FSPQI6ETW4

not attested not anchored not stored refs pending

Matroid 3-connectivity and branch width

Jim Geelen, Stefan H. M. van Zwam

arxiv:1107.3914 v2 · 2011-07-20 · 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{7VE75PWR4DSI2IY2FSPQI6ETW4}

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	2026-05-18T02:31:36.679361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd49febed1e0e48d231a2c9f047893b7117d1a70e92b7de887dfe6371f80d405

Aliases

arxiv: 1107.3914 · arxiv_version: 1107.3914v2 · doi: 10.48550/arxiv.1107.3914 · pith_short_12: 7VE75PWR4DSI · pith_short_16: 7VE75PWR4DSI2IY2 · pith_short_8: 7VE75PWR

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/7VE75PWR4DSI2IY2FSPQI6ETW4 \
  | 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: fd49febed1e0e48d231a2c9f047893b7117d1a70e92b7de887dfe6371f80d405

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "577d4767ecf9415a485f4d77838fc06b242b3994c0125bb979f5e06a03c13675",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-07-20T07:58:12Z",
    "title_canon_sha256": "edcdd7dd345e4fe44a7b3212258a377b6010ecac3842bd79b63d5458a81d036a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.3914",
    "kind": "arxiv",
    "version": 2
  }
}