Pith Number

pith:UDCFXJEX

pith:2019:UDCFXJEXPDWZ4D3W7YE5MZXP3M

not attested not anchored not stored refs pending

Simulating Maxwell-Schr\"odinger Equations by High-Order Symplectic FDTD Algorithm

Guoda Xie, Ming Fang, Wei E.I. Sha, Zhixiang Huang

arxiv:1906.09589 v1 · 2019-06-23 · physics.comp-ph · math.SG · 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{UDCFXJEXPDWZ4D3W7YE5MZXP3M}

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	2026-05-17T23:42:37.475399Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0c45ba49778ed9e0f76fe09d666efdb04431ff247a84c5312023392283aeb3e

Aliases

arxiv: 1906.09589 · arxiv_version: 1906.09589v1 · doi: 10.48550/arxiv.1906.09589 · pith_short_12: UDCFXJEXPDWZ · pith_short_16: UDCFXJEXPDWZ4D3W · pith_short_8: UDCFXJEX

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/UDCFXJEXPDWZ4D3W7YE5MZXP3M \
  | 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: a0c45ba49778ed9e0f76fe09d666efdb04431ff247a84c5312023392283aeb3e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7229e43220c7a2b9df525c92210626bede77dc771077dcbaaff36a3fdb885fc",
    "cross_cats_sorted": [
      "math.SG",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.comp-ph",
    "submitted_at": "2019-06-23T12:17:40Z",
    "title_canon_sha256": "64471cf22f47ad9f8c7c2df70fff9213b7e99c3d784e3a8bdd6257451af500c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.09589",
    "kind": "arxiv",
    "version": 1
  }
}