Pith Number

pith:XUNMDHEA

pith:2019:XUNMDHEAJ23RGWEZEWNSSJHYCS

not attested not anchored not stored refs pending

Free fermions in disguise

Paul Fendley

arxiv:1901.08078 v1 · 2019-01-23 · cond-mat.stat-mech · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XUNMDHEAJ23RGWEZEWNSSJHYCS}

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

Free fermions in disguise without exponential degeneracies

Free fermionic and parafermionic multispin quantum chains with non-homogeneous interacting ranges

Receipt and verification

First computed	2026-07-05T00:17:00.208321Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd1ac19c804eb7135899259b2924f8148ee1fb10210db43eec0fe1a75a27015a

Aliases

arxiv: 1901.08078 · arxiv_version: 1901.08078v1 · doi: 10.48550/arxiv.1901.08078 · pith_short_12: XUNMDHEAJ23R · pith_short_16: XUNMDHEAJ23RGWEZ · pith_short_8: XUNMDHEA

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/XUNMDHEAJ23RGWEZEWNSSJHYCS \
  | 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: bd1ac19c804eb7135899259b2924f8148ee1fb10210db43eec0fe1a75a27015a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04074416c8737a654b949fb724d41cb9e8ed03528fd227117cf06ee3b168d96f",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.stat-mech",
    "submitted_at": "2019-01-23T19:01:28Z",
    "title_canon_sha256": "9343104c7cb50b0b326c0dbd7f67f71d44b811449777a3a63d7d3d35cf15e0e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.08078",
    "kind": "arxiv",
    "version": 1
  }
}