Pith Number

pith:B6KQQID2

pith:2009:B6KQQID2GUB3ETWA4VCXA2IPWG

not attested not anchored not stored refs pending

Party Polarization in Congress: A Network Science Approach

Andrew Scott Waugh, James H. Fowler, Liuyi Pei, Mason A. Porter, Peter J. Mucha

arxiv:0907.3509 v3 · 2009-07-20 · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B6KQQID2GUB3ETWA4VCXA2IPWG}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:17:03.511230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f9508207a3503b24ec0e54570690fb195dd07a08280b05a2a37f6e20140dbdc

Aliases

arxiv: 0907.3509 · arxiv_version: 0907.3509v3 · doi: 10.48550/arxiv.0907.3509 · pith_short_12: B6KQQID2GUB3 · pith_short_16: B6KQQID2GUB3ETWA · pith_short_8: B6KQQID2

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/B6KQQID2GUB3ETWA4VCXA2IPWG \
  | 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: 0f9508207a3503b24ec0e54570690fb195dd07a08280b05a2a37f6e20140dbdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36a0fd22c4960c5768996f847abd464d56069d8d91d1decf54c814fcd849b3d9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2009-07-20T22:44:30Z",
    "title_canon_sha256": "9f4ce61389f7831d4bdd67f39e7df2cd300d5b6ea70ab459d182fab3348289ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3509",
    "kind": "arxiv",
    "version": 3
  }
}