Pith Number

pith:S6Z5H2EQ

pith:2019:S6Z5H2EQM53EGPCLSQAWCHLSYX

not attested not anchored not stored refs pending

Observation of an unpaired photonic Dirac point

Baile Zhang, Gui-Geng Liu, Haoran Xue, Hong-Xiang Sun, Lei Bi, Peiheng Zhou, Xiao Lin, Xin Ren, Yidong Chong, Yihao Yang

arxiv:1909.00351 v1 · 2019-09-01 · physics.app-ph · physics.optics · 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{S6Z5H2EQM53EGPCLSQAWCHLSYX}

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	2026-07-05T01:12:23.022774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97b3d3e8906776433c4b9401611d72c5e0b4da6eb945f499eba8ae9a5fed2c60

Aliases

arxiv: 1909.00351 · arxiv_version: 1909.00351v1 · doi: 10.48550/arxiv.1909.00351 · pith_short_12: S6Z5H2EQM53E · pith_short_16: S6Z5H2EQM53EGPCL · pith_short_8: S6Z5H2EQ

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/S6Z5H2EQM53EGPCLSQAWCHLSYX \
  | 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: 97b3d3e8906776433c4b9401611d72c5e0b4da6eb945f499eba8ae9a5fed2c60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "950101f01f29efde0dec0ab3663bda227a99219d8242ef6d0b5cc00008052a46",
    "cross_cats_sorted": [
      "physics.optics",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2019-09-01T08:22:20Z",
    "title_canon_sha256": "648002f20b88f64a543d56482f9fffa70665f9a69420c767f98bfe1a176a2990"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.00351",
    "kind": "arxiv",
    "version": 1
  }
}