Pith Number

pith:ETUG53YL

pith:2009:ETUG53YLAQTIHEYAFTAJF7USWW

not attested not anchored not stored refs pending

The effects of interactions on the topological classification of free fermion systems

Alexei Kitaev, Lukasz Fidkowski

arxiv:0904.2197 v3 · 2009-04-14 · cond-mat.str-el

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ETUG53YLAQTIHEYAFTAJF7USWW}

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.

Cited by

2 papers in Pith

What's Done Cannot Be Undone: TASI Lectures on Non-Invertible Symmetries

Tori, Klein Bottles, and Modulo 8 Parity/Time-reversal Anomalies of 2+1d Staggered Fermions

Receipt and verification

First computed	2026-05-18T03:24:06.969049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24e86eef0b04268393002cc092fe92b59cffc58dbd69142444a4ff910b392510

Aliases

arxiv: 0904.2197 · arxiv_version: 0904.2197v3 · doi: 10.48550/arxiv.0904.2197 · pith_short_12: ETUG53YLAQTI · pith_short_16: ETUG53YLAQTIHEYA · pith_short_8: ETUG53YL

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/ETUG53YLAQTIHEYAFTAJF7USWW \
  | 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: 24e86eef0b04268393002cc092fe92b59cffc58dbd69142444a4ff910b392510

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13b7701563994d1fb266a4ed214963afc3c6853f8cbd4733b3c42c2cd5aa0ed0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2009-04-14T20:20:26Z",
    "title_canon_sha256": "8db8bb9191b7f65119ee077ad13d061b2f70103781c2d8e991bd37a9ebfa450d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2197",
    "kind": "arxiv",
    "version": 3
  }
}