Pith Number

pith:Z2TEJZQ7

pith:2024:Z2TEJZQ7A3F3NXJODJ2IK6VSAD

not attested not anchored not stored refs pending

PAC-learning of free-fermionic states is NP-hard

Antonio A. Mele, Jens Eisert, Lennart Bittel, Lorenzo Leone

arxiv:2404.03585 v2 · 2024-04-04 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z2TEJZQ7A3F3NXJODJ2IK6VSAD}

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	2026-07-05T10:39:09.044651Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cea644e61f06cbb6dd2e1a74857ab200f0d7ff53092dc4f76bd1ffe52588f415

Aliases

arxiv: 2404.03585 · arxiv_version: 2404.03585v2 · doi: 10.48550/arxiv.2404.03585 · pith_short_12: Z2TEJZQ7A3F3 · pith_short_16: Z2TEJZQ7A3F3NXJO · pith_short_8: Z2TEJZQ7

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/Z2TEJZQ7A3F3NXJODJ2IK6VSAD \
  | 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: cea644e61f06cbb6dd2e1a74857ab200f0d7ff53092dc4f76bd1ffe52588f415

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ddbe2130ba0bf7672180cd0970ea5f124bd2ea1643f3b292d686bd8be1c2484",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2024-04-04T16:50:10Z",
    "title_canon_sha256": "59e5468cb3745c693209e07f46227c6ed0184748e9ae7f5aa414cabf9effb951"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.03585",
    "kind": "arxiv",
    "version": 2
  }
}