Pith Number

pith:Y657RDSI

pith:2019:Y657RDSIZDJITOZBQ2KUE5VT4H

not attested not anchored not stored refs pending

Fermion doubling theorems in 2D non-Hermitian systems for Fermi points and exceptional points

A. P. Schnyder, Ching-Kai Chiu, Jiangping Hu, Zhesen Yang

arxiv:1912.02788 v3 · 2019-12-05 · cond-mat.mes-hall

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y657RDSIZDJITOZBQ2KUE5VT4H}

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	2026-07-05T02:19:25.114103Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7bbf88e48c8d289bb2186954276b3e1e37ef08c282806b849502a350ca85a81

Aliases

arxiv: 1912.02788 · arxiv_version: 1912.02788v3 · doi: 10.48550/arxiv.1912.02788 · pith_short_12: Y657RDSIZDJI · pith_short_16: Y657RDSIZDJITOZB · pith_short_8: Y657RDSI

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/Y657RDSIZDJITOZBQ2KUE5VT4H \
  | 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: c7bbf88e48c8d289bb2186954276b3e1e37ef08c282806b849502a350ca85a81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a97faeb8d3a0da6890b82c65f30c21d54a728ae1605810b36958b911c9e767e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2019-12-05T18:30:13Z",
    "title_canon_sha256": "83210f2e1444d5f66d2d5ba47b02d6c23e72bd63693e4ca9014430eec780d6a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.02788",
    "kind": "arxiv",
    "version": 3
  }
}