Pith Number

pith:NQTYGBM4

pith:2015:NQTYGBM4DCWHFYXKSI56MCJJTW

not attested not anchored not stored refs pending

Air-compatible Broadband Angular Selective Material Systems

Chia-Wei Hsu, John D Joannopoulos, Marin Solja\v{c}i\'c, Yichen Shen

arxiv:1502.00243 v1 · 2015-02-01 · 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{NQTYGBM4DCWHFYXKSI56MCJJTW}

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	2026-05-18T02:28:06.381041Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c2783059c18ac72e2ea923be609299d8e55cd6fece6e4eb8f285bd67ef29d80

Aliases

arxiv: 1502.00243 · arxiv_version: 1502.00243v1 · doi: 10.48550/arxiv.1502.00243 · pith_short_12: NQTYGBM4DCWH · pith_short_16: NQTYGBM4DCWHFYXK · pith_short_8: NQTYGBM4

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/NQTYGBM4DCWHFYXKSI56MCJJTW \
  | 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: 6c2783059c18ac72e2ea923be609299d8e55cd6fece6e4eb8f285bd67ef29d80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c09ae36236737db5e43f9797edced553ea6a02b49fa0026cc3fa1522e496e31f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2015-02-01T12:39:45Z",
    "title_canon_sha256": "13a320084a12fea7e4c85737005e0d0e9e798e710c78638cc9e68da1ecccc6c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00243",
    "kind": "arxiv",
    "version": 1
  }
}