Pith Number

pith:MMPGP4PO

pith:2020:MMPGP4POB2RMP3KCNQYA45MMGD

not attested not anchored not stored refs pending

Exceptional points in a topological photonic system

Bingsuo Zou, Chang-Yin Ji, Junhua Dong, Qingmei Hu, Yongyou Zhang

arxiv:2007.05900 v5 · 2020-07-12 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MMPGP4POB2RMP3KCNQYA45MMGD}

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	2026-07-05T02:56:36.471899Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

631e67f1ee0ea2c7ed426c300e758c30d0558f01434d74c611941e424c44a57b

Aliases

arxiv: 2007.05900 · arxiv_version: 2007.05900v5 · doi: 10.48550/arxiv.2007.05900 · pith_short_12: MMPGP4POB2RM · pith_short_16: MMPGP4POB2RMP3KC · pith_short_8: MMPGP4PO

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/MMPGP4POB2RMP3KCNQYA45MMGD \
  | 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: 631e67f1ee0ea2c7ed426c300e758c30d0558f01434d74c611941e424c44a57b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e677a64a4afd69de05bb625e5770aa277f1cc3b18bd16ab59fb2fc2784e6a25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2020-07-12T03:45:59Z",
    "title_canon_sha256": "20f3f202937abb3b79c32b757d70a8cf2c883356363977816f8c05d733ad0614"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.05900",
    "kind": "arxiv",
    "version": 5
  }
}